MTV.co.uk News — Reports claim the pair have been 'cosying up' together and Taylor Swift is NOT happy about it... more info

TMZ — Does Katy Perry have an obsession with pizza, just because she ordered out for it ... while partying in a Las Vegas nightclub ... where she's supposed to be watching her boyfriend Diplo's concert? Of course not. It's her pizza onesie and selfies in�... more info

Perez Hilton — Ooooh! Has the romance been rekindled?  Katy Perry was recently spotted partying in Las Vegas because gurlfriend deserves some party time after traveling the world on her Prismatic tour!    Well, while enjoying her night out in Vegas, KP was spot... more info

MTV.co.uk News — Pop star spotted hanging out as dance music maestro DJed in Vegas... more info

Mercury News, California — Katy Perry's Prismatic World Tour is her finest road show yet. more info

L.A. Times - News — more info

L.A. Times - Entertainment — Declaring that “nobody reps this place harder than I do,” Katy Perry took over Staples Center on Friday night for the first of two hometown concerts on her Prismatic World Tour. more info

The Daily Mail — She may be the face of sportswear brand Adidas, but it appears as if Rita Ora has taken some inspiration from fellow pop star Katy Perry. more info

Perez Hilton — It's gotta be so hard when two of your fabulous, fun girlfriends are feuding! Poor Lorde surely knows what this is like because she's not only total besties with Taylor Swift, but we just got reminded of her friendship with Katy Perry! And while Tayl... more info

Perez Hilton — We know their rivalry is alive and well via Rolling Stone and Twitter… But could these EXCLUSIVE pics of Katy Perry leaving Nobu in El Lay at the same time as Harry Styles on Thursday be a direct dig at Taylor Swift?! Allow us to elaborate on o... more info