Rockstar was produced by Louis Bell, who co-produced a song by Post Malone that was released on November 4, 2016 by what record company?
Rockstar (Post Malone song):  The track features a guest verse from fellow American rapper 21 Savage, and was produced by Tank God and Louis Bell (who co-produced his hit single "Congratulations"). Congratulations (Post Malone song): "Congratulations" is a song by American rapper Post Malone. Congratulations (Post Malone song):  It was released on November 4, 2016, by Republic Records as the first promotional single from his debut studio album, "Stoney".
Republic Records