Katy Perry's list of exes just got a bit longer.

During her Witness World Wide live stream, the "Roar" singer had a candid conversation with James Corden — even taking some time to (begrudgingly) rank the sexual prowess of her exes, Orlando Bloom, John Mayer and Diplo.

After Corden asked her to rank those three high-profile stars on their skills between the sheets, Perry threw a real curveball by saying, "Josh Groban's in there" before quickly adding, "Just kidding."

Just kidding? Well, sort of.

Corden was genuinely surprised to hear Groban's name, which caused Perry to try and backtrack and say he's not really on the list. She did admit, however, that he was the inspiration for one of her big hits.

"People are like, 'Who's 'The One That Got Away' about?," she said. "That's Groban."

She then said they are "good friends."

Good friends or not, Perry spilled the beans, so now we just have to wait and hear what Groban has to say about this ill-fated romance.

Every Katy Perry Album and Single Cover Ever: