None of these are really"guilty" pleasures for me, but I still love them...

Britney Spears (especially the songs that -aren't- singles... Like "That's Where You Take Me" & "Don't Go Knockin' On My Door"),
Hanson, Ke$ha, Spice Girls, various Morning Musume subgroups (Salt5, 7Air, etc)

Junk/Reality TV: Keeping Up With The Kardashians, Amish Mafia, Breaking Amish, The Hills, Laguna Beach, MasterChef (and pretty much anything else Gordon Ramsay does- I also have a huge crush on him), etc....

Also Nikki Reed. I have a mega huge crush on her. Her and a couple other girls.. I just can't think of them right now.

And Mayfield's brand Moose Tracks ice cream... Alternatively, Extreme Moose Tracks. And my lasagna.. I will eat 1/2 the pan in 1 sitting... Not really.

Oh! And tabloid magazines: Us Weekly, People, Star, Ok Magazine, & InTouch Weekly.