Most awkward round of 'F---, Marry, Kill' ever? Nick Jonas was forced to play the game using his two most high-profile exes -- Miley Cyrus and Selena Gomez -- as well as his good friend Demi Lovato. Yikes!

While visiting London's Capital FM radio station, Jonas -- who admittedly played a PG version of the game called 'Lips, Wife, Leave It' -- was (understandably) reluctant to begin the round because he is forever a true gentleman.

"Well, I'll start it with this: I'm in a pretty happy relationship. That's the disclaimer," the singer explained. Still, he let a little loose and opened up.

"Demi, obviously, wife, because we're like brother, sister and friends," Jonas revealed in the vid, which you can watch here. "I'd prefer to spend life with her as opposed to the others." Ouch?

And as for choosing Cyrus or Gomez? "I dated both of them at some point in time so it makes it a little more uncomfortable," he said about the former Disney ladies. "I'd probably say, uh… Selena, lips, and Miley, leave it. Although, I got love for Miley. She's great."

While Jonas stopped short of saying he was still friends with his exes -- "We're friendly," he admitted, saying he doesn't have "any issues with either one of them" -- he didn't leave the interview without a little friendly PSA.

"…With the game we just played, and any of this stuff, you don't realize sometimes, that we will see each other, and they will have heard this," Jonas told the radio DJ. "It's a game, but it's still kind of uncomfortable."

We feel ya, Nick Jonas.

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