Lots of "adult contemporary music" falls into my "guilty pleasures" category. Things like:
*"Sweet Love" by the Commodores
*"All Night Long" by Lionel Ritchie
*"Love Is The Answer" by England Dan and John Ford Coley (of course, this one has some legitimacy to it since it was written by Todd Rundgren)
*"Man In The Mirror" by Michael Jackson
*"Missing You" by Diana Ross
*"Fantasy" by Earth, Wind, and Fire
*"You Light Up My Life" by Debby Boone
*"No One Else On Earth" by Wynonna Judd
*"I Can't Make You Love Me" by Bonnie Raitt (of course, she's pretty legit too)
And in other categories:
Just about anything by (horrors!!!) The Archies, Daryl Hall and John Oates, Phil Collins, the Control and Rhythm Nation albums by Janet Jackson, a good bit of Madonna's stuff, and lots and lots of Monkees records.