Editor
It seems Machine Gun Kelly’s “Mainstream Sellout Tour” concert in Los Angeles was a star-studded affair.
On Wednesday, the rapper performed at the Kia Forum in Inglewood that included guest appearances from stars like Halsey, Travis Barker and Lil Wayne, as well as a number of other well-known artists such as Avril Lavigne, who were backstage.
It marked Barker’s return to the stage to play the drums after being hospitalized with…
