The Jonas Brothers, because they're fans of Dream Theater.
Say what now?
MP, a while back, mentioned via tweet or FB that he ran into one of the brothers (the drummer, I assume) in an airport and that the brother said he was a fan of Mike's drumming, or at least knew who Mike was.
EDIT -- the tweet in question: "Strange: running into Kevin Jonas (of the Jonas Brothers) at baggage claim at LAX...Even stranger: he knows who I am! : )" (4/11/10)