Mario Lopez is airing his dirty laundry!
The "Saved By the Bell" alum stops by "The Ellen DeGeneres Show" on Thursday, where he reveals some of his personal stories from his new memoir, "Just Between Us."
"When a man turns 40, it's an important time to pause and reflect on how he got there, and to make a mature plan for the future, and what better way than to write it down?" he tells Ellen DeGeneres of his decision to write a memoir.
"People have asked me a bunch of stuff over the years… it's stuff I could really get into in the book as opposed to having the opportunity on TV," he explains. "When I decided I was going to do something like this, I just said, 'Alright, I'm going to be unfiltered and just put everything out there."
The "Extra" host definitely is putting everything out there, including a story of a one-night stand with a Hollywood starlet!
"You also admit that you had a one-night stand with a major pop star," DeGeneres questions.
"Well, yeah," Lopez admits, confirming that the rendezvous took place in Las Vegas. "I'm trying not to give too much away without giving too much away… it was maybe six or seven years ago… eight years ago?"
Mario reveals that he and his former flame are still "friendly," but refuses to answer if he had interviewed the mystery star in the years since they slept together.
The talk show host even throws out some names to get Lopez to bite -- check out the video above to see his response!
Who do you think the pop star is? Sound off below.