This is an Instagram photo off of Jennifer Lopez’s account. A few weeks ago, Jennifer made a surprise guest appearance on stage with Taylor Swift as part of Swift’s week-long concert series in LA. They sang “Jenny From The Block” together and all seemed well. But Star Mag is trying to make some kind of catfight happen:

Taylor Swift should’ve gotten the scoop on Jennifer Lopez’s diva behavior before she had J.Lo make a cameo at her concert in LA! While fans frekaed out over Jen’s surprise performance on August 24, Taylor was also in a tizzy.

“Jennifer was exteremely rude to some of Taylor’s closest friends backstage,” an event staff member tells Star. “Jennifer made it clear they shouldn’t look in her direction or speak to her.”

Now Jen is on Taylor’s bad list – right along with her numerous exes, says the spy, who adds that Taylor has decided she will never work with J.Lo again or even invite her to a performance.

[From Star Magazine, print edition]

It really seemed like we were in midst of another good Swifty catfight. Remember when Swifty tried to start something with Amy Poehler and Tina Fey? Remember when everybody began to notice that Swifty has some kind of bizarre fatwa against brunettes? Yeah, Swifty is always good for a catfight. Alas, it was not to be with J.Lo.

Taylor Swift would so totally get back together with Jennifer Lopez to perform again. While a celebrity tabloid is reporting that the two didn’t get along when J.Lo was the “22” singer’s surprise performer at her Aug. 24 concert in Los Angeles, a source tells E! News that nothing could be further from the truth.

“The performance collaboration was a fantastic experience, and Taylor was thrilled,” the source said. “Jennifer and Taylor hit it off tremendously and they had a blast working together, as did their respective crews.”

Star magazine claims Lopez was “rude” to some of T. Swift’s friends and demanded they not look at her or talk to her. The magazine went so far as to say Swift has decided never to work with Lopez again or even invite her to one of her concerts.

“Taylor loved working with Jennifer, and was so impressed with her professionalism,” our source said. “Taylor is even putting together a video of her week of shows in L.A., and this will be a big part of that. Clearly, she would not do that if she was not going to work with her again.”

At the concert, Swift introduced Lopez by talking about when she was a little girl.

“You know how you have your favorite song that you just play over and over and over again,” she said. “You just blast it in your room and you’d sing in front of your mirror into a hairbrush, right? You have that one favorite song. It was your favorite song to dance to. Los Angeles, this is my hairbrush song.”

With that, the sold-out crowd of 15,000 went crazy as they heard the opening notes of “Jenny From the Block.” They ended with a big hug.

“Thank you for inviting my family to be a part of yours @taylorswift13!!! #RedTourLA,” J.Lo tweeted along with an Instagram photo showing four different pics of them in her dressing room.

Swift tweeted, “Sang Jenny From the Block with @JLo tonight at Staples Center. STILL FANGIRLING OUT ABOUT IT.”

[From E! News]

I actually sort of surprised that Taylor and Jennifer did get along. It doesn’t seem like they would have too much in common, and neither woman is famous for playing well with other women. But it looks like they did just fine. Catfight canceled!

Also, did you hear that Taylor made it into the Guinness Book of World Records? She has the record for the Fastest-Selling Digital Single with “We Are Never Getting Back Together,” AND she’s the first solo female artist to have two million-selling weeks on the U.S. Billboard album charts.

Here are some pics of Swifty out and about in LA earlier this week. Say what you will about Stalker Eyes, but she has really nice legs.

Photos courtesy of Fame/Flynet and Instagram.