Is Justin Bieber jealous of Selena Gomez’s love life? The 21-year-old singer posted yet another throwback photo of his ex-girlfriend, this time following rumors that Gomez is dating “One Direction” heartthrob Niall Horan.

Reports surfaced Saturday that Gomez, 23, was packing on the PDA with Horan, 22, while at actress Jenna Dewan-Tatum’s 35th birthday party Friday night. The event was held at Bootsy Bellows in Los Angeles, and those in attendance told E! that the two were seen “dancing close together all night, kissing on the lips and hugging a lot.”

This is the second time that the two were spotted together. Us Weekly reported in late November that the pop stars also grabbed dinner with friends. However, a source at the time told the outlet that the pair were “strictly friends.”

Gomez and Horan have yet to comment on speculation that they’re a new couple, but Bieber took to Instagram Saturday to share an old photo of him with Gomez.

“Crazy throwback,” he captioned the picture. The image is a candid one of Bieber and Gomez holding hands while walking.

This is the second time within a week that the “Sorry” crooner shared a throwback photo of his former belle. Bieber previously shared a picture of him sitting behind Gomez on a quad. While he initially did not caption the image, he later added one after “Jelena Is Back” began trending on Twitter.

“Just a throwback calm down,” he added.

Justin Bieber and Selena Gomez first started dating in 2010 but broke up in 2012. They’ve been on and off ever since. The two were last sighted just a couple weeks ago when a photographer caught them at the Montage Beverly Hills Hotel. Bieber serenaded Gomez with the song “My Girl” before slow dancing to Lionel Richie’s “Easy.”