Attention all humanoids! We're detecting a foreign presence on the set of Marvin Marvin. Hmm, we're sensing it's a musical presence. And we're getting a very high reading in the funny department. Okay okay, we know who this is. It's the boys of Big Time Rush! As you must already know, this Saturday night the BTR boys are guest-starring on a special hour-long episode of Marvin Marvin, "Big Time Marvin." And you know what that means... we're in for a lot (and we mean a LOT) of dancing!