Though she recently denied rumors that she is in a relationship, Selena Gomez kissed her rumored-on again boyfriend, Justin Bieber, backstage at the 2013 Billboard Music Awards on Sunday.

The two were photographed sharing a kiss while surrounded by bodyguards and award show personnel. The pair did not walk the red carpet together and did not even sit together - though a seating arrangement photo taken from inside the arena showed they were supposed to. However, they did sneak a chance to embrace each other - Gomez also wrapped her arm around Bieber's neck - on Sunday

See the photo here of Gomez and Bieber kissing.

Charity Lynne Baroni, Gomez's friend who sat next to her and Taylor Swift at the ceremony, reportedly tried to pull the 20-year-old singer away from Bieber but she hung on for another hug and they whispered goodbyes. Swift was present during the kiss as well but the sight made her sick and she was caught sticking out her tongue in disapproval. After Bieber realized he was being filmed, he tried to get the cameras away from him, according to Hollywood Reporter.

See Swift here stick out her tongue.

Gomez confirmed her single status in a radio interview earlier in May. When he asked her if she is "completely available in every way," she responded with a "Yep." However, she was spotted with Bieber on May 18 catching the late show performance of LOVE by Cirque du Soleil at the Mirage in Las Vegas, sources confirmed to E! News.

"The pair got close and comfortable in their seats while snacking on peanut M&Ms and Mike and Ikes candy," one of the source said. "Bieber was sporting a low hat and sunglasses during the show."