AceShowbiz -

Jennifer Lopez is the latest singer to share the same stage with Taylor Swift. For the last show on her four consecutive nights at Los Angeles' Staples Center, Swift brought out the "American Idol" judge to perform "Jenny From the Block".

"You know how you have your favorite song that you just play over and over in your room?" Swift asked the crowd before introducing Lopez. "And you sing it in front of a mirror into a hairbrush? Los Angeles, this is my hairbrush song."

Lopez appeared on the stage in a silver-colored sleeveless shirt and a matching baseball cap. The duo sang and energetically danced to the classic hit. "Thank you for inviting my family to be a part of yours @taylorswift13!!! #RedTourLA," J.Lo tweeted.

On the previous concert, Taylor brought out Ellie Goulding, whom she described as "incredible, wonderful, insanely talented incredibly cool artist." "She's not from around here. She's actually from the U.K.," the 23-year-old country crooner told her fans before welcoming Goulding to the stage. Both singers performed Goulding 2012's "Anything Could Happen" to hundreds of excited fans.

"I want them screaming right now. Now, everybody, I want you to put anything you have lit up, up," Swift instructed the crowd during the performance. The audience responded by waving their glow-sticks. "Jump! Jump! Jump!" Swift then asked fans to jump as she and Goulding finished the song.

"So.. Anything could happen at one of our LA shows. @elliegoulding showed up to sing 'anything could happen'! 15,000 person dance party," the "We Are Never Ever Getting Back Together" hitmaker tweeted after the show.

Goulding also took to Twitter to rave about her and Swift's performance. "So.much.fun. Love that girl," she wrote. "Still blown away by how incredible the @taylorswift13 show is and how lucky I feel to have been a part of that last night."

Taylor Swift Performs "Jenny From the Block" With Jennifer Lopez:

Taylor Swift Performs "Anything Could Happen" With Ellie Goulding: