Then: Xtina appeared on "The New Mickey Mouse Club" and lent her singing pipes to an animated Disney movie, as in this song. "Genie in a Bottle" launched Aguilera's solo career.
Then: Chasez met his future boy-band mate in a Disney TV gang. His solo career took a hit after another star's wardrobe malfunction. His initials stand for . . .
Now: He's dropped a pair of solo albums, but he's best known now for his latest TV role.
Then: When Disney pulled the plug on "Hannah Montana," it sparked a whole new career for the young entertainer -- and a new image (photos).
Now: Her latest project -- and a rekindled romance?
Then: She shot to fame as Lizzie McGuire, protagonist of the Disney show of the same name, who often appeared in cartoon form. And also in this movie.
Now: Now 23, she’s married to an NHL star and pregnant. See pictures of her 14-carat engagement ring.
Then: Efron headlined the "High School Musical" series, as captain of a team and love interest to another Disney star. He also sang and danced in videos like "Now or Never" .
Now: He's graduated from TV to the big screen for hit films in which he switched bodies with Matthew Perry and played opposite John Travolta in drag.
Then: The original Disney TV star , Funicello is an icon for baby boomers, who watched her in beach-blanket movies with another '60s heartthrob.
Now: Funicello has had to cope with a debilitating disease.
Then: Gomez started an acting career on a magical Disney show and spinoff movie. With her band, she records for Disney's record label. Watch her do "Naturally."
Now: She's starring in a summer rom-com and launched her own fashion line. Professionally, her fashion line and a rom-com are on deck for 2011.
Then: While on "MMC," Gosling was far from his native country, so he ended up living with another cast member's family. Watch them in a Boyz II Men number.
Now: The Oscar-nominated actor is a hot Hollywood property. His 2010 film with Michelle Williams garnered much buzz, as did this summer's hit.
Then: You know her from "High School Musical", but Hudgens was also on a Disney show starring twins. She ended a high-profile romance with what's-his-name.
Now: Hudgens' music career has produced modest hits. She appeared in an action movie and has dabbled in fashion.
Then: With brothers Joe and the other one, Nick starred on the Disney show "Jonas L.A." and in the "Camp Rock" flicks. But his real passion, and claim to fame, is the family band.
Now: Without his bros, Jonas fronts the Administration (watch him talk about the band), so named because he'd love this job. Here's "Who I Am."
Then: Everyone knows LaBeouf from the Disney movie "Holes," but kids of the early '00s were already fans from his TV series for the Mouse House, seen in these clips.
Now: LaBeouf has played an archaeologist's son, a tycoon's protégé and a man among warring robots. A 2008 accident seriously injured a key body part.
Then: At 12, Lohan found fame as the freckle-faced star of a hit Disney film .As an adult, the actress has struggled with substance abuse and the law.
Now: Time spent in bars landed her behind them. She was rejected as a potential contestant on a reality-TV show but keeps her hand in the fashion biz. She made news last week with a new tattoo on her torso. What was it?
Then: Lovato found fame in Disney TV movies about a music camp, co-starring a real-life band of brothers. She'd previously been a purple dinosaur's sidekick
Now: Though her career is thriving , Lovato underwent treatment last year. For what?
Then: Yup, her older bro is this ex-child star. Osment established herself as sidekick to a popular Disney character and by starring in a kids' film about kidnapping.
Now: Following Disney-star tradition, Osment has released albums and the attendant music videos. She caused a scandal when racy pics with Miley Cyrus leaked.
Then: You know him as Cory Baxter, the little brother on "That's So Raven" who spun off his own series, set in the White House. How did Cory end up there?
Now: Massey was first runner-up but the most charismatic performer on last fall's "DWTS" season. He has a new Disney series, though you won't see him on it.
Then: Russell found fame on "Felicity", but it wasn't her first TV gig. The mop-top was a "Mickey Mouse Club" kid with another future actor.
Now: After dating a less-famous ex-Mouseketeer, Russell married non-actor Shane Deary, with whom she has a child. Her 2010 TV comedy showed promise. What was its fate?
Then: A Disney show launched Spears' career, which skyrocketed with ". . . Baby One More Time" (watch). She dated a Disney co-star. See the couple in all-denim formal wear.
Now: She had a revolving-door stint with rehab and wed twice. Spears is mom to two boys and dating a non-entertainer.
Then: Along with two other future pop superstars, Timberlake appeared on a '90s Disney show. Then he joined a famous boy band.
Now: He said "bye bye bye" to adolescence, partly thanks to an older ex-girlfriend and roles in major movies, including an Oscar winner.
Then: Tisdale's "High School Musical" character has dough; her Disney hotel comedy character keeps things sweet. Off camera, she launched a music career . Her TV series about cheerleadingdidn't make it past its first season.
Now: She reprised a role for a direct-to-video movie. Yes, she's fessed up to plastic surgery.
Then: She'll always be a "Cosby Show" cutie to us, but Raven-Symoné found solo fame in a 2003 Disney movie and then on her self-titled Disney sitcom.
Now: Started the year looking slimmer! Though she talked openly about her weave in a documentary, she's sensitive about this feature.
Then: Before playing the mean rich girl on a prep-school-set '80s sitcom , Whelchel co-starred on a 1970s rival of a classic Disney show.
Now: Author of religion and parenting books, Whelchel advocates a controversial discipline technique. As for acting, she's appeared on a reunion show
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