Selena Gomez and Niall Horan allegedly kissed as they attended Jenna Dewan-Tatum's 35th birthday bash at Bootsy Bellows. The pair was reportedly spotted packing on some PDA at the party.

“Niall and Selena were seen kissing in the middle of the club, in front of everyone,” an insider told Us Weekly.

“[They] definitely seemed very close and like they were together. Niall got there first with his bodyguard, and next thing I know, I looked over and Selena was there. They were very close together, talking, whispering.”

Selena Gomez and Niall Horan was spotted kissing, hugging and dancing close to one another. They also took a photo together with the celebrant and a group of friends.

Another eyewitness told ET that the 23-year-old singer and One Direction heartthrob looked "flirty."

"He had his arm around her and was rubbing her back, and they were chatting close," the source said.

Selena Gomez and Niall Horan performed at the Los Angeles Jingle Ball concert earlier in the night, and it’s not the first time the duo was seen together.

Although Selena recently admitted that she now prefers to date older men, so it is quite a shock for her fans to see herr with the 22-year-old singer.

But Selena and Niall have always been good friends, and even got dinner together on November 23, one day after they both attended the American Music Awards in L.A.

Whether they're dating or not still remains a mystery, what's important is that the two were definitely among the A-listers who had a lot of fun at Jenna's birthday party.

The duo was then spotted leaving through the back door of the West Hollywood hot spot together.

What’s most interesting about this is that the One Direction singer is also friends with Selena’s on-off love, Justin Bieber.

In fact, Jelena was just spotted together on November 20 looking like a couple at the Montage Beverly Hills.