"Rockstar" (stylized as "rockstar") is a song by American rapper Post Malone. It was released on September 15, 2017, by Republic Records as the first single from his upcoming project Beerbongs & Bentleys. The track reached number one on the US Billboard Hot 100, and reached the top spot in several other countries, including Australia, Canada, Ireland, New Zealand, and the United Kingdom. It became Post Malone and 21 Savage's first number one in all the countries mentioned. Read more on Last.fm.