McScientologist?

Man she's already got this Hollywood celeb thing figured out:

TOM CRUISE and KATIE HOLMES have secretly asked AMERICAN IDOL runner-up KATHARINE McPHEE to sing at their upcoming wedding.
Actress Holmes reportedly met McPhee at Los Angeles' Church of Scientology, where the singer allegedly attended courses with her boyfriend, and
has since become a huge fan of the pretty brunette.

A "source" close to TomKat declares her a future "singing legend." Perhaps they will attend her wedding as well... once she dumps her boyfriend for the reincarnation of L. Ron, of course.

UPDATE: Nothing to see here people, keep moving with your McPheever as scheduled, as you can see here in an interview with Taylor Hick... er, Glenn Beck:

BECK: Is it true that Tom Cruise asked you to sing at his wedding?

MCPHEE: I get that question non-stop. And you know what? I have no idea where that rumor came from.

BECK: Really?

MCPHEE: And I have not gotten any confirmation from any kind of management camp, so...

BECK: Are you a Scientologist?

MCPHEE: No, I`m not a Scientologist.

BECK: Really? Both of those things are rampant on the...

MCPHEE: Both of those things are false.

BECK: Really? So you haven`t met those guys?

MCPHEE: I have not met -- no, I`ve not met Tom Cruise or Katie Holmes. I`d like to.