USA Today Music — Katy Perry, Lorde, Macklemore & Ryan Lewis and Imagine Dragons also get sales bumps. more info

ContactMusic — It seems Katy Perry and Justin Bieber are similar in more ways than one.The 'Prism' hit maker was recently crowned the most followed person on... more info

TMZ — Katy Perry tipped a girl and she liked it -- then she tipped more -- dropping STACKS on hot strippers after the Super Bowl Sunday night ... and to make it even more awesome, her BF John Mayer was there too.We're told Katy and John… more info

CNN Showbiz — Katy Perry is officially the queen of Twitter. more info

MTV.co.uk News — Star thanks fans, before urging them to follow her boyfriend John Mayer... more info

L.A. Times - Entertainment — Little Mix touched down in the U.S. last year with surprising force, scoring the highest-ever chart debut for a British girl group's first album. (Sorry, Spice Girls.) But might success have come too soon for these alums of the U.K. "X Factor"? Where... more info

ContactMusic — Katy Perry has amassed 50 million followers on twitter.The 'Roar' hitmaker reached the staggering milestone last week after adding a huge 18 million... more info

L.A. Times - Entertainment — Artists such as Steve Wonder, Dave Grohl and Katy Perry talk about the Beatles' musical importance amid performances for 'The Night That Changed America: A Grammy Salute to the Beatles.'Dave Grohl was on his way to rehearsals for a TV special marking... more info

NME — The boyband beat Eminem, Daft Punk and Katy Perry in terms of digital downloads, streaming and physical sales more info

Stereogum — You don’t have to be a legit rock star to get an MTV Unplugged these days. In recent years the show has hosted quite a few household names (Paramore, Alicia Keys, Adele, Mumford & Sons, Katy Perry, 30 Seconds To Mars, a very-plugged-in Lil Wayne). ... more info