Cam Gigandet
Now that the Twilight hottie's hair is back to normal, we can focus on those swoon-enducing muscles once again! Thank you, GQ.
Elsa Pataky & Vin Diesel
The Fast Five costars bring the gun show to the set of of a Spanish talk show, where the sexy stars are promoting their flick.
Cameron Diaz
Move over Madonna! One of Charlie's Angels has been seriously hitting the gym! Wonder if she's been getting work out tips from A-Rod?
Zac Efron
Holy High School Musical! Efron's arms have doubled in size since his Disney days. In his upcoming romance drama The Lucky One, he plays a Marine who returns from Iraq in search of a woman he believes was his good-luck charm during the war.
Kellan Lutz
His shirt can barely contain him! No wonder Calvin Klein came knocking on Lutz's door for their recent underwear ad campaign. AnnaLynne McCord is one lucky girl.
Chris Hemsworth
How much did the Aussie actor have to eat to bulk up for his role in Thor? "My body weight in protein pretty much!" Hemsworth laughed when we asked him about his buff bod.
Cristiano Ronaldo
Forget about his fancy footwork on the field, it's the soccer stud's biceps, triceps, and even forearms that are the stars of this Emporio Armani ad.
Hugh Jackman
Jackman's Wolverine-ready biceps make us want to howl! So how does the X-Men star get in the zone when it's time to train? "I crank up the Godsmack and Metallica," he tells Men's Health. "I yell and scream, which helps me get into the character and have a b**** of a workout."
Dwayne Johnson
The former wrestler may no longer be in the ring but has obviously maintained his "Rock"-solid guns.
Taylor Lautner
In addition to working out, the beefed-up Eclipse hottie doubled his calorie intake to gain over 30 pounds for the Twilight sequels. Sorry Rob, Taylor's got you beat in the bicep department.
Joe Manganiello
Does this chiseled upper-bod look familiar? It might be because True Blood's Manganiello worked with the same trainer who helped Hugh Jackman bulk up for his Wolverine role in X Men.
Ryan Reynolds
We first saw Reynolds' unbelievable arms in Amityville Horror and luckily for us, he'll be showing them off again in the upcoming superhero movie Green Lantern. We can only imagine how Scarlett Johansson feels wrapped up in those babies.
Jake Gyllenhaal
Hair extensions weren't the only thing Gyllenhaal put on for his first action flick Prince of Persia. Look at those giant guns he grew for the part!
Nelsan Ellis
Flipping burgers at Merlotte's has definitely paid off for True Blood's Layfayette.
Mike “The Situation” Sorrentino
Sorrentino isn't just about his six-pack. The self-proclaimed guido also has a massive situation happening with his arms.
Rutina Wesley
"Every other day I do a special 30-20-10 push-up circuit," the True Blood actress told Fitness Magazine of her enviable arms. Despite being so ripped, Wesley says, "I look like I can beat you up but I'm as soft as a flower."
Ronnie Magro
Jersey Shore's Ronnie definitely takes the "G" in GTL seriously. Just look at those monstrosities!
Christopher Meloni
Even at 49-years-old, the Law & Order: SVU actor has jaw-dropping biceps. Must give costar Mariska Hargitay a good reason to go to work everyday.
Madonna
Yikes! The Queen of Pop has some shocklingly defined guns for a gal her age.