Marc Anthony is denying rumors that he’s a cheater. After news broke that Anthony and his now estranged wife Jennifer Lopez were divorcing, tabloids began reporting that the Latin singer was having an affair.

In an interview with ABC News, Anthony flat out denies the accusations, saying some of the things he’s heard are ridiculous. “It was a flight attendant, it was the pilot — I heard it was this guy sitting next to me in a rehab in Houston. I’ve heard it all,” Anthony tells ABC News.

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“People are trying to peg it on things because it was so shocking. It was like, it must have been something … It wasn’t something sensationalistic,” Anthony reveals, adding that the marriage just stopped working.

“It was a realization on both our parts … It wasn’t shocking. These things happen,” he adds.

You can watch Marc’s exclusive full interview on Nightline tonight at 11:35/10:35 p.m. Central Time on ABC.