That's not the number of men Holly Madison slept with last night. Nor is it the number of time she flashed her breasts.
Instead, that's the age this Playboy model turns today, as Madison was an early Christmas present for her parents in 1979.
The past 12 months haven't been especially kind to Holly. She and her busty friends ranked as THG's eighth biggest celebrities of 2008, but failed to recapture their former glory after moving out of the Hugh Hefner's mansion this year.
Since then, Madison got voted off Dancing with the Stars very early on season eight; broke up with Criss Angel; heck, dated Criss Angel; and watched as Kendra Wilkinson stole the spotlight with the birth of her son.
In other words: Holly needs all the birthday wishes you can muster! As you enjoy her photo montage below, send them in today!