Are Justin Bieber and Selena Gomez back together again? After reuniting for mutual friend Alfredo Flores' birthday, it seems like 'Jelena' is really a couple.

Are Justin Bieber Comparisons Bothering Austin Mahone?

After an Instagram video showed Gomez and Bieber side-by-side celebrating Flores' birthday at Bootsy Bellows on June 16, reports started to confirm that Gomez and Bieber are once again a couple. Before the party, Gomez and Bieber were also seen riding on motorcycles together.

The couple broke up last year, but have been seen together on many occasions including in March in Texas. Bieber was there to support Gomez during a concert appearance and then stayed for a showcase at South by Southwest.

Did Justin Bieber Break Up Calvin Harris And Rita Ora?

"Justin and Selena are definitely full-on back together at the moment," a source told Us Weekly. "They spent all day riding together on a Can-Am Spyder on Sunset Blvd. ... Justin drove while Selena sat on the back holding on to [him]."

The source continued, "He was incredibly sweet with her and they looked super happy and in love." Although they're together now, another source told Us Weekly that anything could happen with these two.

"It is always on-and-off," the Bieber source continued. "Same story, every other week, every year. Now they are together again, next week they won't be. They never stop talking, even when you don't see them together -- that never changes. They fight, take a break, and then get back together. No surprise that it happened once again."

Before Bieber's reunion with Gomez, he was last linked with supermodel Adriana Lima who he reportedly hooked up with in Cannes. "He had fun with Adriana," Us Weekly said. "[But] it won't turn into anything serious." A source confirmed the two went home together after a house party in the resort town.

Tags: Justin Bieber Selena Gomez