Nick: Paris Cheated on Me w/ Chad Michael Murray

10/5/2006 2:31 PM PDT

Nick: Paris Cheated on Me w/ Chad Michael Murray

It was bombshell after bombshell when Nick Carter called into Ryan Seacrest's top-rated morning show on KIIS FM in Los Angeles Thursday morning. The former Backstreet Boy shocked both Ryan and listeners by claiming he "hooked up" with Ashlee Simpson, as an act of revenge against his ex-girlfriend Paris Hilton.

According to Carter, Paris forced the situation after she allegedly cheated on him with her "House of Wax" co-star Chad Michael Murray. When asked if Murray was together with his ex-wife Sophia Bush at the time, Nick promptly responded, "Yeah."

After repeated apologies to Ashlee, Nick explained that he never meant to "throw her under the bus in the whole entire situation." He wasn't as kind to Paris. "Paris and her are two different people and Ashlee is a good person from what I know ... and I'm not saying that Paris is a bad person, but I'm saying she's got to work her problems out."

Nick said the initial reason for his call was to apologize, telling Ryan "this was one of those things I wanted to keep under wraps ... and then my brother kind of let the cat out of the bag."