Publicity stunt... Bieber is lying there like actors do in movies and tv shows, hardly anyone ever lies like that though, it's staged.... even more convinced they are trying to get him a bad boy image of a straight dude and he's hiding his true sexual orientation
I also think that girl's average at best, she has something off-putting, + her legs are just the pits, they could be of a construction worker or something
Glad that she's happy and getting paid though, bet she earned a nice buck from this!