filed under: Jennifer Aniston

When you're as unlucky in love as Jennifer Aniston, the last thing you want is some flirty young blonde chasing after your bloke.

So it's no wonder the Friends star sent Kimberly Stewart packing when she tried to sneak backstage at John Mayer's recent gig.

But it took dim Kim some time to get the message - she got kicked out TWICE.

John clearly has a bit of history with the model as all hell broke loose when clingy Jen spotted 28-year-old Kim backstage while John was warming up for Sunday's Hard Rock Calling gig in London's Hyde Park.

Ever the gent, John tried to defuse the situation by getting his security to boot out Kim.

And as the bouncers chased after Kim, Jen, 39, eyeballed her rival to warn her off John.

Our spy says: "Jennifer spotted Kimberly and asked John what she was doing there.

"John and Kim know each other from clubbing in LA, but Jennifer doesn't want anyone around who reminds her that he used to be a player.

"She has fallen head over heels for John, but she's scared it will all go wrong again.

"Another woman stole her man before when Angelina Jolie started dating Brad Pitt - she couldn't bear it to happen again."

But Kim wasn't giving up without a fight...

Ten minutes after being told to leave, she was on the side of the stage, waving at John and cheekily catching Jennifer's eye while she was taking photos of her fella.

We hear: "She had been told twice by security that she would be removed but she stood there bold as brass.

"Jennifer was on the opposite side of the stage and John felt like piggy-in-the-middle.

"He saw the tension and told his bouncers to get rid of her at all costs.

"Kim was pulled off the stage and escorted through the Hard Rock VIP tent with a face like thunder, shouting: 'Why doesn't he want me here? Is this because of her?' "She totally embarrassed herself, but Jen looked relieved."

Somehow we can't see these ladies being best Friends anytime soon...

Connelly… will not be included in an upcoming cover shoot for Marie Claire magazine that will feature Aniston… and her other co-stars from the October comedy, Drew Barrymore and Ginnifer Goodwin. “Word is, Aniston threatened to pull out if Jennifer was part of the cover,” says an insider familiar with the movie’s shoot. “It was all about getting Jennifer Aniston front and center and looking as sexy as possible.”

So what’s Jen’s beef with [Connelly]? While Aniston’s rep denies that there’s any discord between the actresses, they just didn’t hit it off, says the insider: “There was no camaraderie between those two whatsoever. They didn’t seem like friends in the slightest.”

New couple Jennifer Aniston and John Mayer are making some beautiful music together — in the bedroom!

In the new issue of Star, we report on the couple's superhot sex life that has left Jen floating on cloud nine for the last couple weeks.

"She is having the best sex of her life with John," a source close to the actress tells Star, "and she's loving every minute of it."

So just what does John do to make Jen think her body is a... wonderland?

According to the source, the singer covers her with whipped cream, which he licks off, tickles her with feathers and uses ice cubes to give her goosebumps.

"John also likes to keep things interesting with games like role playing, which is new for Jen," says the source. "She was a little resistant at first, but now you couldn't wipe the smile off her face if you tried."

Another source who has slept with John agrees he knows how to have a good time between the sheets. "He was kinky and liked trying crazy positions. He loved sex and wanted it all the time."

You wouldn't expect Jennifer Aniston to be giddy like a schoolgirl these days. Not with the news that ex Brad Pitt and his baby-machine girlfriend Angelina Jolie are pumping out twins in a couple of weeks. But the former "Friend" has been glowing of late, pals of the actress tell us.

"She's just so happy and giggly. It is completely out of character," said one spy.

The reason can't just be that she is dating John Mayer. No one is that happy with Jessica Simpson's sloppy seconds. What we hear is there is a certain feature of John that leaves Jen so pleased. The crooner's ex-paramours reveal he is hell to get over, not because he's a great guy, but because he's a "great" guy, if you know what we mean.

"His body actually is a wonderland," one ex was overheard saying.

Jennifer Aniston has told friends John Mayer is a better lover than her ex-husband Brad Pitt.

The former ‘Friends’ actress, 39, is reportedly more impressed by her sex life with Mayer than with previous partners Vince Vaughn and Brad Pitt.

A source told the National Enquirer, “Jennifer is calling John the best ever lover.

“In fact, she can’t stop raving about his skills between the sheets - insisting the sex with him is way better than it was with Brad during their four-and-a-half-year marriage.”

Jennifer’s romance with the ‘No Such Thing’ hitmaker is said to be helping her finally get over her 2005 divorce from Pitt.

“Only now, in John’s arms, does she look even close to finally putting Pitt in the past tense,” added the source.

"She's really into John, and the nine year age difference doesn't bother her for a second. Jen's already telling friends she's falling in love with this guy. Jen's really hoping he can spend more time in Miami with her. She just wants to see a lot more of him. This was definitely not a one-off thing as far as she's concerned."

Jennifer Aniston had a late private lunch with musician John Mayer in a Miami restaurant that opened Friday afternoon just for them, and then the couple spent a lengthy dinner together Friday night.

When it came to lunch, "I was happy to accommodate them," says Charles Bell, general manager of Michael's Genuine Food & Drink in the Miami Design District, which opened its doors for the pair early at 3:30 p.m. for the 90-minute meal.

Aniston, in Miami shooting the movie Marley & Me with Owen Wilson, ordered a chopped chicken salad, while Mayer had a Serrano ham sandwich which "Jen ate some of," says Bell. For dessert, they shared a chocolate-and-peanut-butter layered treat.

Sitting across from each other in a booth, their heads were close together, and they were engaged in a private conversation, says Bell.

"I can't speculate on what kind of meeting it was but they looked happy and seemed to have a great time," he says.

The same also seemed to be true later in the day, when the two were seen at Casa Tua on South Beach.

With his arm around her, Mayer, 30, and Aniston, 39, left the restaurant a bit before 1 a.m. When they returned to her hotel, they were observed holding hands.

"We are very discreet here," the manager of Casa Tua told PEOPLE after the two had departed. "That is why we have celebrity guests."

One week the rumor mill has Jennifer Aniston paired with Aaron Eckhart, and then suddenly Brian Bouma’s her main man. The latest reports of hot and heavy times for Jen involve her “Marley & Me” co-star Owen Wilson. Conflicting reports? Not according to OK! magazine, whose sources claim Jen’s rolling through the hotties in search of daddy material.

That’s right. Jennifer’s allegedly on a quest to make her maternal dreams come true, and one insider says it’s down to Brian and Owen. “Both men have some of Jen’s favorite qualities: Brian has the height and looks, while Owen can make her laugh,” a pal of Jen’s shared with the magazine. “Either one would be a good choice for Jen.”

Then again, one of the guys may not be ripe for the papa picking. A friend from camp Owen told OK! the actor isn’t seeing anyone seriously, and “wants to keep his options open.”

As for Brian, “(He’s) really good guy,” another source said. “He’s a bit overwhelmed by all the attention since he’s been identified as Jen’s boyfriend.” But not scared off yet, as “(Brian and Jen) still talk on the phone with each other.”

“[Owen's] chemistry with Jen was instantaneous! The hugging didn’t end when the cameras stopped rolling. They were very flirty together, far more than you would expect. In between takes they were hanging onto each other. Jen is known for being a recluse on set, but she’s having so much fun with Owen. She’s just really happy.”

“Although I’m happy in my own skin, I’m not comfortable doing nude scenes. On my movie (The Break-Up) we had a closed set, but it was still very hard.”

Jennifer Aniston’s name may be synonymous with impeccable hair, but according to her former waxer, Jen is just as concerned with the hair on another region of her body! “She’s neurotic about bikini waxes,” reveals Dawn DaLuise of Dawn DaLuise Skin Refinery in L.A., who used to visit the Friends set every other week to work on the actress. “She’d call even when there was no hair to wax. And she’d insist on having it done - literally making me wax off peach fuzz. She’s phobic about extraneous stray hairs - especially around her bikini line. She’ll [even] tweeze them!”