 | | Avril Lavigne first appeared in summer 2002, touting an addictive debut single (the spunky pop/rock gem "Complicated") and a skatepunk image that purposely clashed with the polished glamour of mainstream pop. |
 | | Combining the vocal prowess of Beyoncé, the genre-hopping sounds of Gwen Stefani, and the feisty attitude of P!nk, songwriter Jessie J eventually overcame various career setbacks and health problems to become a star in her own right. |
 | | Before becoming a front-runner in the eighth season of American Idol, Adam Lambert made his name in the theater world, where he performed alongside Val Kilmer in the debut production of Ten Commandments: The Musical and landed an understudy role in a touring production of Wicked. |
 | | Jordin Sparks may have been the youngest American Idol when she won the title on the reality show's sixth season, but the Glendale, AZ, resident had already packed plenty of accomplishments into 17 years. |
 | | A former Christian artist, Katy Perry rebranded herself as a larger-than-life pop star and rose to prominence during the summer of 2008. |
 | | The winner of Fox TV's first American Idol competition during the summer of 2002, Kelly Clarkson went from an anonymous talent to a nationally known singer in a matter of months, performing for an audience of millions. |
 | | Hot Chelle Rae took shape in 2005, balancing the polished sounds of mainstream pop with energized, guitar-heavy dance-rock. |
 | | As the legend of Cobra Starship would have it, frontman Gabe Saporta fled into the deserts of Arizona one day to find the true meaning of his existence away from his emo-rock band, Midtown. |
 | | Splitting the difference between Shania Twain's twangy pop and Christina Aguilera's R&B acrobatics, vocalist Jessie James made her debut with "Wanted," a song that featured prominently in the film Confessions of a Shopaholic. |
 | | A brash and driven pop singer/songwriter, Ke$ha (Kesha Rose Sebert) was born in Los Angeles but moved at the age of four to Nashville, where her mother -- a longtime songwriter -- had inked a publishing deal. |
 | | Although initially viewed as another face in the late-'90s crowd of teen pop acts, Pink (professionally known as P!nk) quickly transcended and outgrew that label with her combination of pop songcraft and powerhouse, rock-influenced vocals. |
 | | Singer Mike Posner launched his career at Duke University, where he balanced his undergraduate studies in sociology and business with his musical habits. |
 | | A striking young woman with a strong vocal resemblance to the young Whitney Houston and a large mop of blonde corkscrew curls, Leona Lewis won the third series of the British reality talent show The X Factor in a landslide. |
 | | Like Martika, Jennifer Love Hewitt, and Rahsaan Patterson, Stacy "Fergie" Ferguson got her first major break as a youngster on the television program Kids Incorporated. |
 | | Before releasing her debut album in 2009, Selena Gomez began her career as a child actress. Born in 1992, she grew up in Texas and got her first break as a cast member on the kids TV show Barney and Friends. |
 | | 3Oh!3 are a duo from Boulder, Colorado (i.e., area code 303), whose style of music includes jokey raps, indie electronica beats, and lots of tomfoolery. |
 | | Owl City is the musical brainchild of Adam Young, who launched the project in 2007 while living at his parents' home in Owatonna, Minnesota. |
 | | Pop singer and actor Jesse McCartney was a child performer dynamo, singing on Broadway and landing an acting gig on All My Children before even joining his first boy band, a feat that came at the age of 12. |
 | | Originally from New Zealand, Natasha Bedingfield grew up in southeast London, where she and her siblings were raised around music. |
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 | | Glamorously gaudy, a self-made post-modern diva stitched together from elements of Madonna, David Bowie, and Freddie Mercury, Lady Gaga was the first true millennial superstar. |
 | | David Archuleta became one of the most recognizable figures on television in 2008, when his tenor vocals and boyish charm helped earn him a second-place finish on American Idol. |
 | | Founded by choreographer Robin Antin in 1995, the Pussycat Dolls began as a burlesque dance revue based in Los Angeles, spawned a second revue in Las Vegas, grew into an A-list phenomena with a revolving cast of guest celebrities, and eventually became a recording act with a number one dance hit. |
 | | R&B vocalist Jason DerĂĽlo launched his career while still in his teens, first as a songwriter for other artists and later as a solo performer. |
 | | Electronic pop-rap group Far East Movement made their major-label debut in 2010. Founded in 2003, the group was originally a trio comprised of high-school companions Kev Nish (born Kevin Nishimura), Prohgress (James Roh), and J-Splif, all of whom had grown up in downtown Los Angeles. |
 | | Before she discovered she could write songs, Gwen Stefani was looking forward to a life of marriage, children, and white picket fences. |
 | | The Veronicas hail from Brisbane, Australia, where twin sisters Jess and Lisa Origliasso began working in show business at the age of five. |
 | | Miley Cyrus became an overnight sensation in 2006 as the star of Hannah Montana, a popular Disney Channel television series whose success allowed Cyrus to launch her own recording career several years later. |
 | | A leader in the parade of Mickey Mouse Club veterans who stormed pop at the turn of the millennium, Christina Aguilera was the sexy, brassy diva of the bunch -- the Rolling Stones to Britney Spears’ Beatles, as it were. |
 | | Taio Cruz is a British pop singer/songwriter whose second album, Rokstarr, catapulted him to international chart-topping success in 2010 with its smash hit singles "Break Your Heart" and "Dynamite. |
 | | More than any other single artist, Britney Spears was the driving force behind the return of teen pop in the late '90s. |
 | | Melding elements of rap, rock, R&B, and funk into one cohesive and melodic sound, upstate New York's Gym Class Heroes have diverse appeal based on their impressive musical dexterity. |
 | | With inventive re-imaginings of the reggae-splashed hook-heavy soul popularized by acts like Sean Paul and Sean Kingston in the early half of the 21st century's first decade, Virgin Island-born singer Iyaz swiftly built up a hearty cult following on MySpace. |
 | | Actress/vocalist Demi Lovato began making a name for herself after starring alongside the Jonas Brothers in the 2008 Disney Channel movie Camp Rock. |
 | | When Nelly Furtado appeared with her neo-hippie, multiculti debut, Whoa, Nelly!, in 2001, a dance-diva makeover seemed like an impossibility, but the singer/songwriter revived and sustained her career with the sexually charged Loose in 2006, in the process consolidating her position as one of the most unpredictable artists of her decade. |
 | | Growing up on the outskirts of Boston, MA, JoJo listened and learned as her mother practiced hymns. She started singing by imitating her mother, but quickly put her own spin on everything from nursery rhymes to pop tunes. |
 | | Originally called Cascade until legal conflicts forced them to change their name, Cascada is the slick, uplifting Euro-dance trio featuring producers DJ Manian and Yanou along with vocalist Natalie Horler, although Horler is sometimes presented as Cascada herself. |
 | | Sister acting/singing duo Aly & AJ -- whose full names are Alyson and Amanda Joy Michalka -- showed a passion for both kinds of performing at a very young age: they started playing piano at age six and began acting classes soon after. |
 | | When a 12-year-old Kristinia DeBarge told her father, James DeBarge (the youngest member of DeBarge), that she wanted to become a singer, the two wrote and recorded a song that had Kristinia in a studio until early morning -- a test to see if she had the determination to follow through on her wish. |
 | | Featuring the anthemic songwriting of Ryan Tedder, OneRepublic rose to prominence in 2007, when "Apologize" began its reign as the most popular digital download in American history. |
 | | Hilary Duff first made a name for herself on the enormously successful Disney Channel/ABC Kids show Lizzie McGuire, which she parlayed into dual careers as a pop singer and film actress. |
 | | Actress/singer Jennifer Lopez was born in the Bronx, New York, on July 24, 1969; after starting out in musical theater as a child, she made her film debut at age 16 in the little-seen My Little Girl, but her career then stalled until she was tapped to become one of the dancing "Fly Girls" on the television sketch comedy series In Living Color. |
 | | The Black Eyed Peas transcended hip-hop to become one of the most commercially successful pop groups of the 2000s. |
 | | Taylor Swift became one of country's brightest (and youngest) faces in 2006, when the 16-year-old released her first album. |
 | | Best known for her roles in the High School Musical films and the TV series The Suite Life of Zack & Cody, New Jersey-born actress/singer/model Ashley Tisdale began her career in show business at age three, and sang for President Bill Clinton at age 12. |
 | | Born Travis Lazarus McCoy in Geneva, NY, rapper Travie McCoy first made a name for himself as the lead vocalist of the alternative rap group Gym Class Heroes. |
 | | A mix of polished pop/rock and neo-soul made Maroon 5 one of the most popular bands of the 2000s, with songs like "This Love," "She Will Be Loved," and "Makes Me Wonder" all topping the charts worldwide. |
 | | After working a string of behind-the-scenes jobs -- including writing songs for Brandy, singing backup for the Sugababes, and impersonating Elvis -- songwriter/producer Bruno Mars put his name on top of the charts in 2009 by co-writing Flo Rida's hit song "Right Round. |
 | | A self-proclaimed product of his past, rapper Sean Kingston's history helps describe his sound. Born in Miami, FL, then raised in Kingston, Jamaica, from the age of six, he mixed more than a little dancehall and reggae into his hip-hop. |
 | | An electro-rap duo from Los Angeles, CA, LMFAO made their major-label debut in 2008. Comprised of producers, DJs, and clothing designers Redfoo and SkyBlu (the son and grandson, respectively, of Motown impresario Berry Gordy), LMFAO worked the club circuit for years before making their major-label debut in 2008 with the single "I'm in Miami Bitch," a song inspired by their first experience at the Winter Music Conference. |