By InStyle Staff
Updated Mar 25, 2013 @ 1:40 pm
Joe Manganiello
Credit: WireImage

Joe Manganiello is famous for his biceps, triceps, and all those other 'ceps—he's even writing a fitness book to share all his workout tips! And considering that bikini season is just around the corner, we pulled the True Blood star (in Hugo Boss) aside at Muhammad Ali's Celebrity Fight Night Founder's Club Dinner in Phoenix this weekend to ask: What's on his workout playlist? "Metal! Lately, we've been doing a combination of either [Pandora's] Metallica channel or the Audio Slave channel," Manganiello told "Those give you all of that 90's music—like Sound Garden, Alice in Chains stuff. It pumps you up." Aren't you pumped just thinking about it? Summer, here we come!

Plus, see more of the sexiest celebrity abs.

— Lindzi Scharf