Katharine McPhee to sing at TomKat Wedding?

Though Katharine informed Larry King that she was not a Scientologist, rumors are flying that she has been asked to sing at the upcoming wedding of Tom Cruise and Katie Holmes.  Could it be true?  Simon did say a few times that Katharine sounded like a wedding singer, didn’t he? 

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.

After McPhee lost out to Taylor Hicks in the “Idol” finale last week, the celebrity couple got in touch with her and asked her to perform at their wedding ceremony.  via