PHOTOS: Jonas Brothers Rock Late Night with Jimmy Fallon

The Jonas Brothers stopped by Late Night with Jimmy Fallon on Thursday night to perform their song, "Paranoid." Kevin, Nick and Joe also participated in a little game called "Lick It For 10" where they hid under a cloak while an audience member licked it, not knowing they were underneath.

"When they pulled the cloak off revealing the boys, the girl turned beet red and was so excited," one audience member tells OK!. "The guys seemed really nice and they were friendly, even sticking around on the stage during breaks."

With reporting by Cara Sprunk