Bruno Mars poses with Hugh Hefner at a party at the Playboy Mansion.

Forget professional athletes -- we're pretty sure most little boys want to be Bruno Mars when they grow up. The 26-year-old has been nominated for a million bajillion awards and most recently, he spent one lucky night at the Playboy Mansion celebrating his cover of the magazine. Bruno is only the 10th man to appear on the magazine's cover, and we're pretty sure he's A-OK with that elite title.

Other celebs on hand for the festivities included Cameron Diaz, Coldplay's Chris Martin, and um, BRITNEY EFFING SPEARS. We're guessing guests played rousing games of Parcheesi while decadent cheese platters made the rounds. JK. We're actually guessing that everyone within a 5-mile radius of that party had to sign serious nondisclosure agreements.

Shout-out to my man Hugh Dawg (my affectionate title for Hugh Hefner). Dude is like 147 years old and doesn't look a day over 70. Any guesses on what his secret is? (Hint: See photo 2.)

Credit all photos: Cameron Duddy