Sexy, Single – and Shirtless!

The heat is on, but their shirts aren't! Check out the treasure chests of Brody, Mario, Zac and more!

01 of 10

BRODY JENNER

BRODY JENNER
PV/Flynet

Birds of a feather flock to the Hills star, who showed off his lean, mean torso on a family vacation in Hawaii. (Hmm ... Wonder if he puts his name on his underwear as well?)

02 of 10

BRANDON JENNER

BRANDON JENNER
Will Binn/ Pacific Coast News

Brody's older brother gets something off his chest – his shirt! – revealing a matching "Jenner" tattoo while on their Hawaiian vacation.

03 of 10

JOHN STAMOS

JOHN STAMOS
Will Binns/ Pacific Coast News

Paging rippling pecs – STAT! The ER doc gets hearts palpitating during a kayaking trip on a Hawaiian beach.

04 of 10

ZAC EFRON

ZAC EFRON
Fame Pictures

At 20, he's too young to drink, but that doesn't stop the actor from bringing his own six-pack to the Utah set of High School Musical 3.

05 of 10

CHRIS CARMACK

CHRIS CARMACK
Will Binns/ Pacific Coast News

The Into the Blue 2 star grins and bares it during a wet and wild day in the Hawaiian surf.

06 of 10

JOHN MAYER

JOHN MAYER
Will Binns/Pacific Coast News

Is he sure his hit single wasn't called "My Body Is a Wonderland?" The singer unveils his tattooed torso while boogie boarding – where else? – in Hawaii.

07 of 10

ANDY BALDWIN

ANDY BALDWIN
Louise Barnsley/ Pacific Coast News

The Bachelor star flexes his muscles during a beachside game of football in Hawaii.

08 of 10

DAX SHEPARD

DAX SHEPARD
Ramey

The funnyman proves he's a tattoo all-star – and fan of stomach crunches – while filming in Manhattan.

09 of 10

ANDRE BIRLEANU

ANDRE BIRLEANU
Gabriel S/ Bauer-Griffin

The America's Most Smartest Model hunk makes a pec-tacular showing while shopping – presumably for a shirt – on L.A.'s Melrose Avenue.

10 of 10

MARIO LOPEZ

MARIO LOPEZ
Kadena Pix/ Bauer-Griffin

The A Chorus Line star unveils his impressive body of work while catching some rays on a Miami beach.

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