"Liam and I grew up together. Liam's real hot," she said Monday night on "Watch What Happens Live."
"I mean, I pick Gale over Peeta any day," said host Andy Cohen.
"I did, at one point!" Lawrence said, getting a high-five.
That wasn't the only secret the star spilled during a game of "Plead the Fifth."
Check out some of her other candid responses.
1. Asked if she'd ever smoked pot at the Oscars, Lawrence said, "I smoked pot at none of them, but I saw my brother smoking out of a bong before one of the Oscars, won't say which."
"Did you take a little hit?" Cohen asked.
"Um, yeah," she replied, sipping a pink, fruity Pumptini, the drink of Lisa Vanderpump's West Hollywood hotspot, that was mixed on-set especially for JLaw.
"Was it when you won?" Cohen said.
"I plead the fifth," Lawrence replied.
When Cohen asked her about a potential Bieber hookup, she responded, "I'm going to say a hard no."
"You and Chris Martin never really confirmed whether you were together or not?" Cohen asked coyly.
"We never did," Lawrence said.
"Were you?" he prodded.
"Come on!" she said, laughing.
"I really do love Joan Rivers, she had such an incredible life and is an unbelievable woman. I just am very opinionated too," Lawrence explained. "I don't think we would have had a beef had we met, so I said that to [Melissa] and complimented her mom and kind of got it out of the way immediately. She's so nice and great, so I got it out of the way and then we were great."
5. She also set the record straight about who her BFF is, despite the media claiming it's Amy Schumer.
During the aftershow, a caller named Laura phoned in with a question, and Lawrence burst into giggles when she realized it was actually her real-life best friend.
"I just want to clear this up once and for all. Who’s your best friend, me or Amy Schumer?" Laura asked.
"You, sausage!" Lawrence cooed. "You’re my sausage, nobody else could ever -- wait, that sounds wrong."