Diddy and his youngest son Christian pointed out the invisible bully last night (Fri. Apr 1) on the red carpet of Christian’s birthday party.

Hosted at Rolling Stone Restaurant and Lounge in Los Angeles, Christian Combs‘ Lucky 13th Birthday Celebration also featured a couple of guest appearances from grandma Janice Combs, young actress Noah Cyrus (Miley Cyrus‘ little sister) and others, who were spotted rocking “Invisible Bully” t-shirts.