Avril Lavigne Brings Out a Pink-Haired Machine Gun Kelly for First-Ever ‘Bois Lie’ Performance

She’s With the Band! Kourtney Kardashian Supports Travis Barker Backstage at Avril Lavigne’s Concert

Avril Lavigne & Mod Sun Share a Kiss as They Leave Her Concert in L.A.

Kourtney Kardashian and Megan Fox Support Travis Barker and Machine Gun Kelly at Avril Lavigne Show