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Justin Timberlake has been in show biz practically his entire life. As a kid he starred in the Mickey Mouse Club. As a teenager he won the hearts of millions of girls as the curly haired heartthrob and lead singer of N’Sync.

JT is all grown up — today he turns 30! Happy Birthday Justin!

As he has gotten older his professional aspirations have shifted. The singer is currently taking a hiatus from making music, and instead has been exercising his acting chops in Yogi Bear and The Social Network.

Now that he’s 30, we wonder if he has any plans to settle down with longtime girlfriend Jessica Biel.

Other celebrities born in 1981 and turning the BIG 30 in 2011: Roger Federer, Serena Williams, Beyonce Knowles, Adriana Lima, Jessica Alba, Elijah Wood, Josh Groban and Paris Hilton.

A famous twin duo will also celebrate their milestone birthday this year. Jenna Bush Hagar and Barbara Pierce Bush will turn 30 on November 25.

Photo gallery below:


Check out other celebrities celebrating milestone birthdays this year:

Famous People Turning 60 – born in 1951

Famous People Turning 50 – born in 1961

Photos: WENN