Joey Bada$$ secretly co-wrote Post Malone's "Rockstar" and featured on an early edit

The version with Bada$$ and T-Pain leaked earlier this week, and Pain clarified that it's not a remix like some fans suspected. Bada$$ also took to Twitter to reveal he co-wrote the track with Malone and promise more "ghostwriting in 2018".

That’s the original. They took me off. And put 21 on. Me and Joey had it first

— T-Pain (@TPAIN) December 28, 2017

This is facts... I actually co-wrote the song w post :) quietly got my first #1 off that more ghostwriting in 2018 https://t.co/7AEApxT6IJ

— BADMON (@joeyBADASS) December 29, 2017