plain white t's get their 'greek' on

Is Dale from "Greek" joining the Plain White T's?

You'll see some familiar faces back on "Greek" this week. Tom Higgenson and the whole gang of Plain White T's are dropping in again, for another of their patented rock-the-house appearances. The house they're rocking? The honors engineering dorm, but don't laugh -- those honors engineers know how to party!

Maybe the T's rock the house too well, because this party gets crazy. Dale isn't in the clearest state of mind, and he starts to think maybe he should be on stage with the band. (Turns out he really shouldn't.) Dale "helps" the T's out on "Our Time Now." We have the feeling he won't be touring with them anytime soon. The T's also perform the single "Natural Disaster" -- they do that one without any unwanted help.

Ever wonder what it's like for the T's to stop by "Greek"? Busy, but good times, says Tom. When we talked with him, he said some of the "Greek" actors go way, way back with the T's. They were fans when the T's were playing tiny clubs, back when no one had ever heard of a girl named Delilah.

What's the most embarrassing thing you've ever done at a party? And if you were going to jump onstage like Dale does, which song would you want to "help" out on?