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This weekend, Beck played to developers at Yahoo Hack Day, in a fantastic little concert on the Sunnyvale campus, making him the second celebrity Scientologist known to visit the Yahoo campus, after Tom Cruise's visit earlier this year.

(Yeah, Beck is a Scientologist. Hate to break it to you.)

So who's next? Kirstie Alley? Jenna Elfman? Earthlink chief Sky Dayton? Here, browse the list of celebrity Scientologists and take a guess in the comments. Tip: Say more than a name. Be clever, readers!

Beck at Yahoo Hack Day [Laughing Squid]
List of Scientologists [Wikipedia]