A fight between Justin Bieber and Tom Cruise would be the biggest pay-per-view event ever, according to UFC president Dana White.

"Oh my God, it would be massive," White said Thursday at the Hashtag Sports Conference in New York. "Everybody laughed when we talked about this, so you've heard of it. I mean, who wouldn't watch that? Everybody would watch it. It's a complete train wreck, and I love it."

Although a fight isn't imminent, discussions have progressed to the point where White is involved.

"I was at home on a Sunday, and I got a call with two big guys on the phone, and they were telling me that this could possibly happen and this could be real," White said. "I'm like, there's no way that this is really going to happen. But if it does, call me. Call me back. I'm in."

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