Heidi Montag marked her 24th plastic surgery birthday yesterday.

She and husband Spencer Pratt paid a visit to the zoo in Santa Barbara, Calif., and for a "divorcing couple," it sure looks like the gruesome twosome is happy.

Posted in: Heidi Montag

Grammy-winning singer Amy Winehouse has made it to age 27. It's a feat we're a little surprised at to be honest, but in a good way. Happy birthday, Ames!

Seriously, if you had Wino in your office celebrity death pool (come on, you know there is one), you probably had pretty good odds. But we're glad you lost.

Posted in: Amy Winehouse

Charlie Sheen turns 45 years old today.

Sadly, that number does not also reflect the number of days this actor was forced to spend behind bars for his December 2009 confrontation with wife Brooke Mueller.

Posted in: Charlie Sheen

The adorable Hayden Panettiere turns 21 today. Break out the champagne! She can now legally enter the clubs she's already been frequenting for years!

The former Heroes star was once in the limelight a lot more.

Posted in: Hayden Panettiere

Already mature beyond her years, Demi Lovato celebrates a milestone today: the singer/actress turns 18!

Send in your birthday wishes right now, as Demi might need a few words of encouragement. She's currently touring with The Jonas Brothers and doing publicity for Camp Rock 2, all of which places her alongside ex-boyfriend Joe Jonas.

Posted in: Demi Lovato

The 42nd President of the United States of America, William Jefferson Clinton, celebrates a birthday today. The Big Dog, our first Baby Boomer president, is 64.

Happy birthday, Bubba!

Posted in: Celebrity Birthdays