TMZ — Katy Perry may not stand a chance at hooking up with Oklahoma quarterback Trevor Knight since he's got a hot girlfriend ... but the next, next best thing says he's single and ready to mingle.TMZ spoke with Tyler Knight -- Trevor's older brother --…... more info

TMZ — Looks like Katy Perry needs to find another college football player to crush on ... because Trevor Knight already has a smoke show girlfriend -- and she's pretty damn smart too.In case you missed it ... Katy appeared on ESPN's "College Gameday"… ... more info

TMZ — Katy Perry unleashed her inner Demi Moore on ESPN this morning -- obsessing over a college football star who's 10 YEARS YOUNGER ... and telling the guy to "Call me!"30-year-old Perry appeared on ESPN's "College Gameday" this morning as the celebrity�... more info

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