Jennifer Love Hewitt's breasts turn 32 years old today.

While they've only been in true, plump, firm existence for about half that time, this pair of knockers has still come a long way. From Party of Five to The Ghost Whisperer to whatever talk show will listen to their owner talk about marriage, the best boobs in Hollywood are worthy of your best wishes.

Rihanna celebrated her 23rd birthday yesterday.

For such a young age, the Barbados native has amassed a huge number of hit songs. She's also drastically altered her image in the last couple of years, shedding her innocent appeal in favor of a harder, edgier, hyper-sexual persona.

Posted in: Rihanna

Paris Hilton turns 30 years old today and, please folks, wish her a happy birthday.

This washed-up A-lister really needs some support, having sat around over the last couple years and watched Kim Kardashian usurp her title as Least Important Famous Member of Society. It's been rough.

Posted in: Paris Hilton

Sarah Palin, beloved politician turned author, speaker, commentator, reality TV star and professional celebrity, turns 47 years young today.

Happy birthday to the Thrilla from Wasilla!

Posted in: Sarah Palin

Taylor Lautner celebrates a quiet birthday today.

The Twilight Saga star turned 18 a year ago, giving women everywhere a reason to cheer and not feel so dirty for ogling this gorgeous actor. Sort of makes 19 feel like less of a big deal, doesn't it?

Posted in: Taylor Lautner

There's a rumor going around that Lauren Conrad is engaged to longtime love Kyle Howard. The star's reps have already come out and denied this. It's not true.

It is her 25th birthday today, however. Happy birthday, LC!

Posted in: Lauren Conrad

Justin Timberlake, who turns 30 today, has done the impossible.

His career is so impressive and wide-ranging that one almost forgets it began with *NSync. Since those days, he's won six Grammy Awards as well as two Emmys.

Posted in: Justin Timberlake

Ellen DeGeneres turns 53 today, and the talk show host won't celebrate by introducing the world to her half-sister.

Instead, the fun-loving comedian will air a special episode that includes a handful of famous friends. Among them: Pink, Colin Farrell and Julia Roberts, the latter two of which are pictured with Ellen below.

Posted in: Ellen DeGeneres