Lindsay Lohan
She has been in front of the cameras since the age of 3, but the Mean Girls star decided to be more than an actress, and her first studio album Speak (released in 2004) went platinum.
Jared Leto
The award-winning actor formed Thirty Seconds to Mars with his brother in 1998. Their songs and albums continue to be popular amongst fans and critics alike, so much so they plan on touring with Linkin Park the summer of 2014.
Drake
Before the Grammy award-winning rapper was known for chart-topping hits, he was famous for starring on Degrassi: The Next Generation as Jimmy Brooks, the basketball star who is confined to a wheelchair after being injured in a school shooting.
Scarlett Johansson
The Her star debuted her first album, Anywhere I Lay My Head, in 2008. The following year she collaborated with singer-songwriter Pete Yorn to record Break Up.
Gwyneth Paltrow
Not only is she a rock star wife, the accomplished actress can hit a few high notes herself. She made her singing debut in the 2000 film Duets and has gone on to sing for royalty.
Jamie Foxx
Now we ain't sayin' he's a "Gold Digger," but the funnyman who got his start on In Living Color collaborated with Kanye West for that No.1 hit on the Billboard Hot 100. Foxx has seen similar success with his four solo albums, but he can't help but return to his comedic roots with songs like "Channing Your Tatum."
Bruce Willis
In 1987, the then TV actor, who was a year away from his lucrative Die Hard movie franchise, released his debut album, The Return of Bruno. Willis saw some success singing as his alter ego, a blues singer named Bruno Radolini.
Jennifer Lopez
J.Lo released her first single "If You Had My Love" in 1999, but was a leading lady well before that. The multitalented star continues to act and sing when she's not a judge on American Idol.
Russell Crowe
Before he was singing as Javert in Les Misérables, the actor formed bands 30 Odd Foot of Grunts and The Ordinary Fear of God. He also recorded the single "I Want to Be Like Marlon Brando" under the name Russ le Roq.
Eddie Murphy
The comedian had one major hit "Party All The Time" in the '80s, but the rest of the album wasn't as successful his acting career that produced hits like 48 Hours and Beverly Hills Cop.
Jada Pinkett Smith
The talented actress is the frontwoman of her group Wicked Wisdom and has even opened for Britney Spears! Jada's hubby, Will Smith, served as the executive producer of her debut album.
Brian Austin Green
The Beverly Hills, 90210 star started rapping on the show the same year he dropped his real rap album One Stop Carnival in 1996. Mr. Megan Fox has since given up on his hip-hop career but is still acting.
Paris Hilton
The jet-setting socialite and actress released her debut studio album, Paris, on her own label, Heiress Records in 2006. And is now set to record a house music album on Cash Money Records.
Donald Glover
The former Community star raps under the stage name Childish Gambino and released his first studio album in 2011.
Juliette Lewis
The actress played crazy in films like Natural Born Killers and Kalifornia, but she's also known for her crazy good band Juliette and the Licks, which broke up in 2009. She's now flying solo and still tours.
Hugh Laurie
The actor played a caustic doctor in House. And he also plays piano, guitar, drums, harmonica and saxophone as a blues man with two albums under his belt.
Milla Jovovich
The Resident Evil star debuted her first album The Divine Comedy in 1994 to critical acclaim and continues to record, releasing songs like "Electric Sky" and "Let You Go" as free MP3 singles.
David Hasselhoff
The actor best known for Knight Rider and Baywatch is a pop sensation in Germany and has released multiple international albums between 1985 and 2012.
Billy Bob Thornton
The Hollywood veteran put down his acting and screewriting chops to pick up a mic and some drumsticks when he founded his band The Boxmasters in 2007. Thornton released four albums prior to that, but this irreverent interview garnered more attention.
Hilary Duff
The Lizzie McGuire star debuted her first album (a collection of Christmas songs) in 2002, but it was the album released in 2003, Metamorphosis, that solidified her pop star status.