Justin Bieber vs. Keyshawn Johnson — Intense Showdown at Singer's Mansion  —  At Singer's Mansion  —  EXCLUSIVE  —  Keyshawn Johnson chased down a speeding Justin Bieber this weekend — and tried to confront the singer about his dangerous driving habits — but JB ran away like a scared little child ... eyewitnesses tell TMZ.

Katy Perry, John Mayer Reunite, Flirt at Her Memorial Day Party  —  For Memorial Day 2013, Katy Perry kicked off summer with a few good friends — including John Mayer.  Two months after their second breakup, the “Shadow Days” troubadour, 35, was among the guests at Perry's brand …

Amanda Bynes Was Not Groped by Police, Says NYPD  —  Police acted appropriately in arresting Amanda Bynes last Thursday, the New York Police Department said Tuesday, denying the actress's claim that an officer had groped her.  —  “Internal Affairs investigators have found no evidence …

This Is What Happens When You Slap Beyonce's Ass At One Of Her Shows  —  There's a part in Beyonce's show where she goes up to some of the BumbleBeys in the front row and puts her mic to their mouths so they can spit out saliva while singing “Irreplaceable.”

Kelly Osbourne Is Our July Cover Girl!  —  It's not only Fashion Police - you have so much going on these days.  What do you want going forward?  —  “Happiness and a Golden Globe.  What?  I'm fabulous.  I need a Golden Globe.  What is life if you're not going to live it to the fullest?

Adam Levine Dating Nina Agdal After Behati Prinsloo Split  —  Credit: George Pimentel/WireImage; Denise Truscello/WireImage  —  Adam Levine really wants to “Love Somebody” — and that somebody happens to be Sports Illustrated supermodel Nina Agdal!  The Maroon 5 frontman and the brunette bombshell …

Mr. and Mr. Smith: Will and Jaden Psych Up for After Earth  —  Will Smith came up with the story for M. Night Shyamalan's postapocalyptic drama After Earth, which opens May 31, while watching his son Jaden, 14, film The Karate Kid in China.  The premise: A father is a best-in-class soldier …

Who Is Leonardo DiCaprio's Cannes Companion?  —  Leonardo DiCaprio hung out with Victoria's Secret model Toni Garrn in Nice, France, on Sunday.  He was spotted chatting with a smiling Toni and a group of friends in a black car after arriving to Port Saint Laurent Du Var on a small boat.

Maurice Jones-Drew CHARGED WITH BATTERY — Allegedly Socked Security Guard  —  CHARGED WITH BATTERY  —  Allegedly Socked Security Guard  —  EXCLUSIVE  —  Jacksonville Jaguars running back Maurice Jones-Drew has been charged with battery after allegedly KO'ing a security guard …

AmandaBynes  —  @matthewnewcomen: @AmandaBynes You made the ny post!  Bashing riri? http://twitter.com/... I saw a bunch of mocked up tweets about me bashing Rihanna in my mentions.  I'm followed by so many people that someone is always mocking up fake tweets so I feel the need to address them!

Rep: Chris Brown Didn't Give Woman False Information In Fender Bender  —  LOS ANGELES, CALIF. — Chris Brown did not give out incorrect information to another motorist following a fender bender in Los Angeles, his rep told Access Hollywood, despite a report claiming otherwise.