See What's On Glee Stars' Cameras!Get the inside scoop on set as Lea Michele, Chris Colfer, Dianna Agron, Mark Salling and the rest of the stars Gleek out in their Twitter pics!

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BRINGING 'FLEXY BACK'

Why fight over a girl when you can work out your aggression in the gym? Salling took this sneaky shot of Monteith hitting the gym on a big day. "Push it!!!!!! Oh it's your birthday? Too freakin bad!!!" he Tweeted.