Are R. Kelly and Justin Bieber working on a collaboration? It’s unclear, but we do know that the two recently met up. The Biebs played the Pied Piper some music, possibly off his upcoming acoustic album.

“Just chillen this weekend with the homie @justinbieber,” tweeted Kellz along with a photo of them hanging out.

Due January 29, Believe Acoustic features acoustic versions of eight songs from the teen superstar’s chart-topping album Believe and previously unreleased songs including “Yellow Raincoat,” “Nothing Like Us,” and “I Would,” produced by Da Internz and Aaron Michael Cox.

On Tuesday, Bieber edged out Lady Gaga to become the most-followed person on Twitter with over 33,348,000 followers.

Meanwhile, R. Kelly has been in the studio working on his new album Black Panties. “I decided to go back and do an old-school R. Kelly album like 12 Play,” he said of his iconic 1993 album. “That’s pretty much what it’s going to be, focusing on more of the bedroom ballads. I like to give people variety and I just gave them two years of romance albums and soul.”