We say it all the time around here, "stars, they're just like us." But if you found yourself nodding your head and singing along to Fun.'s irresistible breakout hit, "We Are Young," during the band's performance
 at Sunday night's MTV Movie Awards, well, then you're just like the stars.

Posted up in a tiny, crimson-lit cube and dressed in sharp white tuxedoes, the boys put as much emotion as possible into the tune (with an assist from Janelle Monáe) and the effect was infectious. Just like you were likely singing along at home, when the camera panned onto the star-studded audience it caught glimpses of Channing Tatum and wife Jenna Dewan bobbing their heads, Jennifer Aniston smiling and digging the tune and even "Twilight" star Kristen Stewart grooving in her seat.

As the crowd rhythmically clapped and sang along, rapper-turned-remodeler Vanilla Ice wasn't immune, with a big smile plastered on his face as his head nodded along. Nor was "Harry Potter" star Emma Watson, who was singing, clapping and shaking her bum to the song's towering chorus. Aniston was flanked by "Hunger Games"' Elizabeth Banks, who also wasn't shy about her enthusiasm for the song of the summer.

One of the biggest smiles was plastered on the face of "Bridesmaids" and "Office" actress Ellie Kemper, who couldn't hide her joyful ear-to-ear grin. Given the slow climb to near-ubiquity that mirrors other across-the-board smashes like "Hey Ya!" and "Crazy," it's no surprise that the audience was digging the song so hard.

See? We told you, the stars are just like us!

Jaw-dropping, heart-pounding, gut-busting moments galore. See what went down at the 21st annual MTV Movie Awards!