Katy Perry‘s ex-boyfriend Travis ‘Travie’ McCoy is such a rebel! The Gym Class Heroes-frontman, who recently released his solo album Lazarus (which spawned the major Bruno Mars-assisted hit single ‘Billionaire’), was arrested in Germany last night after police caught him defacing the Berlin wall with grafitti. He was released a few hours later on 1500 euros bail. We’re not sure how the police found out about Travie’s grafitting, but his tweeting about it while doing it probably didn’t help. Either way, Travie is free and set to perform in Amsterdam tonight.