Justin Bieber’s single days are officially over… again… for now… ‘cause he’s back on with Selena Gomez - but there’s one major catch - he’s gotta stop acting out. 

According to sources, Selena had firmly resisted reuniting with Justin after their most recent breakup because he and his friends have been acting out the last few months, most recently peeing in a mop bucket!

But Justin was able to change her mind… and on July 4th, sources say he won her back  by promising to change his ways. Apparently, Selena bought it.

Bottom line, it seems like no one else can fix Justin, so why not give Selena a shot? It might just be crazy enough to work.