It’s been a busy week for Jennifer Lawrence, and following an incredible Thursday (July 9) at the 2015 San Diego Comic-Con, she headed over to “Conan” for a chat.

The “Hunger Games: Mockingjay Part 2” actress was lovely as she told of her encounter with Bill Murray, but the real excitement occurred when J Law treated Conan’s audience to a song.

O’Brien noted, “You sang a ballad for Mockingjay,” adding that it had gone to #1 on the charts. Lawrence replied, “Okay, first of all if I’d have gone, ‘Pfffft Hunger Games’ it would have reached number one. I could’ve gone [armpit fart], seriously. It wasn’t [down to] me.” From there, Jen, goaded by costars Liam Hemsworth and Josh Hutcherson, sang a section from “Believe” by Cher. Check the clip!