Avril Lavigne and Mod Sun share passionate embrace after she opens for Machine Gun Kelly in LA

Travis Barker Gives Surprise Performance at Machine Gun Kelly Show for First Time Since Hospitalization

Kourtney Kardashian cozies up to husband Travis Barker at pal Machine Gun Kelly's concert in LA

These Funko Pop! Vinyls of BTS, Machine Gun Kelly, Britney Spears & More Are on Sale During Prime Day