Whats funny is BIRTHDAY is a bigger FLOP than Unconditionally.... which was top 20.

But to be honest, katy has been very hit and miss this era, Unconditionally and Birthday did poorly.

The album sales aint snatched either, regular degular. I guess thats what happens when people are gassed too much. Poor boo boo. This single will flop too Walking on Air and legendary Lovers are clearly the superior songs