katy perry owes half of her decent success recently because of all the ****ing publicity rihanna constantly has given her since 2008. mentioning her in almost every ****in interview and mentioning her in her damn songs.
According to MediaTraffic it's at around 3.5m (a bit more I think), but that site only counts the major markets so it usually under-reports sales. I've seen 5 million mentioned...so you could say anywhere from 3.5m to 5m, which sounds about right.
Katy Perry's "Last Friday Night (T.G.I.F.)" vaults from #63 to #31 in its second week. It's vying to become the fifth #1 hit from Perry's Teenage Dream album. No female artist has ever pulled five #1 hits from an album.
Sorry, I didn't check!
Same week that California Gurls did 
