CONCERT GOER SMACKS BEYONCE'S ASS: BEYONCE did a show in Denmark on Monday, and some dude in the front row reached out and smacked her behind as she walked by!

Bey had just walked up to him and let him sing into the mic, and when she turned her back and started walking off, he hit her. Naturally, Beyoncé was not amused. She quickly turned back around, glared at him, and told him she would have him thrown out. No word if she actually did.

JUSTIN BIEBER IS A SEGWAY-RIDING, POT-SMOKING, RECKLESS TERROR: JUSTIN BIEBER'S neighbors say he's a menace on the road -- in and out of his Ferrari. Folks in the gated community tell TMZ they saw the little hellion and a friend over the holiday weekend riding their Segways side-by-side while smoking a joint in full view of some neighborhood children.

Prior to that incident, The Bieb was allegedly witnessed driving at breakneck speeds through the neighborhood. Two of his neighbors called the cops, including former NFL baller KEYSHAWN JOHNSON. According to TMZ, Keyshawn was driving on Monday night when Justin flew past him going way too fast. Key chased him to the front of his driveway, and tried to talk to him about it, but Bieber allegedly fled into his house to avoid a confrontation and refused to come out. Smart move. He may be a former player, but he's still nine inches taller and is all muscle!

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At least one other person called police to report Justin's reckless driving that night, and the cops ended up questioning him, but as of this morning, there's no word what, if anything will come of that. Justin is currently being investigated over an incident where he allegedly spit on a neighbor and threatened to kill him, after the guy complained about Justin's driving.


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On Monday, Mayer showed up at a party at Katy's house, and one source tells Us Weekly they looked like a couple again. Quote, "They seem to be back together . . . or back together-ish." Another alleged eye-witness adds, quote, "They were definitely friendly."

The day before -- on Sunday -- Katy hung out with ROBERT PATTINSON at a ranch in Montecito, California. "People" magazine says they were sitting at the back of a courtyard, watching two strangers rehearse for their wedding. "There was no PDA between them and no body language that showed they were dating," according to the magazine's source. "They just sat together and watched."

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AMANDA BYNES GETS INTO TWITTER SKIRMISH WITH COURTNEY LOVE: After going at it with RIHANNA on Twitter over the Memorial Day Weekend, AMANDA BYNES went off on a new target yesterday; COURTNEY LOVE. It all started when Courtney reached out to Amanda, tweeting, "Pull it together, dude." When Courtney Love tells you to pull it together, you can be pretty sure your life is a wreck.

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Amanda didn't take too kindly to the message, shooting back with "Courtney Love is the ugliest woman I've ever seen. To be mentioned by her at all makes me and all my friends laugh!" But Courtney didn't fight back. Instead she wrote, "Amanda, I wasn't attacking you, love. I've been in your shoes before, wasn't easy. DM me, let's talk. Ignore the haters." There's no word if Amanda did. But the exchange no longer appears on either of their Twitter feeds.

Just before that rant, Amanda Tweeted that she still plans to sue the NYPD officer who she claims "slapped her vagina" while arresting herThursday. "His punishment will be being the cop who sexually harassed someone who would never find him handsome enough to be my boyfriend," she wrote, adding,  "That's worse than any time in jail."

CELEBRITY YEARBOOK: We continue to explore what some of today's big stars looked like in their yearbook photos. Today's featured celeb is GWYNETH PALTROW ...

Seth Poppel Yearbook Library
Seth Poppel Yearbook Library

KENNY CHESNEY IS PEOPLE MAGAZINE'S HOTTEST COUNTRY HUNK: The new issue of "People" magazine features Country Music's Hottest Guys, and the top honor goes to KENNY CHESNEY Others that made the cut include, in no particular order, TIM McGRAW, LUKE BRYAN, BLAKE SHELTON and KEITH URBAN.

TODAY IN CELEBRITY WARDROBE MISHAPS - STACY KEIBLER: GEORGE CLOONEY'S girlfriend, STACY KEIBER, had a bit of a wardrobe malfunction the other day. It appears Stacy, in Monaco for the Grand Prix, forgot to zip up before posing for pictures. The end result is a peek of her pink thong! (PHOTO) (PHOTO)

BABY POOP: JESSICA SIMPSON looks like she's about ready to pop any minute, but word is she isn't due for another month or so. (PHOTO)

WATCH: This is either going to make you really hopeful or really sad. TYLER PERRY told ELLEN DEGENERES yesterday that he’s really tired of playing Madea, and if it were up to him he’d stop doing it. So is he? Press play!