Grammy Awards 2015: Taylor Swift and Katy Perry Cross Paths and Other Moments You Didn't See on TV

Taylor Swift and Katy Perry crossed paths at the Grammys Credit: Kevin Mazur/WireImage; Kevin Mazur/WireImage

Put music's biggest stars in a room together for far too many hours and some shenanigans are sure to go down. While the onstage action at the 2015 Grammy Awards was captivating, some of the best moments took place when the cameras weren't rolling. 

Us Weekly was on the scene inside Los Angeles' Staples Center on Sunday, Feb. 8 for the 57th Annual Grammys and caught all the behind-the-scenes happenings. Under the cover of commercial breaks, the stars interacted with  — and in some cases ignored — one another, and staged some priceless moments. 

Below, the seven Grammy gems you didn't see on television.

Katy Perry and Taylor Swift's Run-In

The two frenemies were dangerously close to one another at the Grammys. After Swift's famous diss of Perry, 30, in her song "Bad Blood" over some alleged wrongdoing, and Perry's ensuing digs at Swift, 25, they chose not to greet one another at the show. 

According to eyewitnesses, Perry walked directly past Swift's seat during the show. The "Style" singer avoided a confrontation by staying glued to her cell phone — keeping her eyes on her screen, typing away and not looking up as Perry brushed past her. Insiders add that Perry did clap for Swift when she took the stage to present the award for Best New Artist, but that was apparently the extent of goodwill between the pair.

Celebs Get "Happy"

Pharrell Williams' rousing performance inspired a huge reaction from the famous faces in his audience. Onlookers reveal that as he sang, the Grammys became an epic dance party. The sisters of Haim were the first ones to stand up and groove to the music.

The three stars were soon joined by their pal Taylor Swift, who showed off some serious choreography. Jamie Foxx's daughter Annalise Bishop stood on her chair to take in the show, and even Kim Kardashian and Kanye West had some fun. The world's most talked-about couple swayed to the music together and snuggled in their seats after the performance. 

Apple of Gwyneth Paltrow's Eye

While Paltrow, 42, took the stage to introduce her "beautiful" BFF Beyonce Knowles' grand finale performance, she also spent time with another loved one at the show. Observers tell Us that the Goop founder toted her daughter Apple, 10, with her to the Grammys. 

Paltrow's eldest daughter with ex-husband Chris Martin stayed through the end of the show to take in Beyonce's performance. Once Bey wrapped, Paltrow held her little girl's hand and snuck out of the theater. 

Country Music's Power Couple

Blake Shelton and Miranda Lambert had quite a night at the Grammys. The two country superstars celebrated Lambert's big night and soaked up their time together at the bash. According to attendees, Shelton, 38, was toasting with a red solo cup (contents unknown) that he toted throughout the night. 

Lambert, 31, stunned with an impressive performance of "Little Red Wagon" and took home the Grammy for Best Country Album for 2014's Platinum. As soon she nabbed the honor, Lambert ran straight to her hubby, who put his arm around the star and congratulated her. 

Madonna's Biggest Fan

The Queen of Pop defended her title at the Grammys, inspiring a standing ovation with her matador-and-minotaurs performance of "Living for Love." During the set she was celebrated by just about everyone in the house, but one of her biggest supporters was none other than one of pop's newest princesses, Ariana Grande.

Onlookers spill that Grande, 21, who has cited the Material Girl as one of her inspirations, completely lost it during Madge's gig. She made her affection for the star known, screaming and jumping as she sang. 

Beyonce's New BFF

Queen Bey made a point of introducing herself to a fellow diva at at the show. Sources tell Us that Beyonce, 33, went out of her way to orchestrate a meeting with Annie Lennox, who pulled off one of the night's most electrifying performances when she belted "I Put a Spell on You" with Hozier at her side. 

While the Eurythmics front woman sat in her seat, Beyonce leaned over to chat with her and shake her hand. 

Letting Her Finish

More than five years after Kanye West famously interrupted Taylor Swift with his "Imma Let You Finish" speech at the MTV Video Music Awards, the rapper and the country-pop megastar officially buried the hatchet. Insiders tell Us that after West, 37, jokingly rushed the stage again, he came back with a smile to his seat and was soon greeted by Swift. 

Swift ran over to West in the audience and threw her arms around him after the moment, chatting with the performer, his wife Kim Kardashian, and pal Jay Z. West and Swift both cracked up as they embraced, showing little bad blood remains between the two.