Cardi B, fresh off the release of her new single “Up,” joined Jimmy Fallon on the Tonight Show on Thursday to talk—among other things—the inspiration behind the track, her instaclassic Megan Thee Stallion collab, and her impending sophomore album.

“I really wanted to have Megan [on “WAP”] but I didn’t know her that well,” Cardi told Fallon when asked how last year’s ubiquitous hit came together. “Our stylists linked us up and when our stylists linked us up, we kicked it off really well. We were saying ‘I got a song for you’ and I said ‘I got a song for you’ and she loved my song and she hopped on it and we made herstory.”