Jelena is back. Selena Gomez and Justin Bieber are apparently back together and were spotted celebrating a friend's birthday at Bootsy Bellows in West Hollywood. TMZ caught the two on video and claims that the "Slow Down" singer never left Bieber's side.

Earlier in the day, Gomez was seen riding with Bieber on his Can-Am Spyder 3-wheeler at the beach. Last week the "Boyfriend" singer hinted at a reunion when he Instagrammed a photo of Gomez hugging him with the caption, "Our love is unconditional."

However, Bieber quickly deleted the photo leaving many fans to wonder what was going on between the two pop stars. According to Hollywood Life, Bieber and Gomez's reunion is once again ruining the friendship between the 21-year-old singer and her BFF Taylor Swift.

"Taylor and Selena are still friends even though she went back to Justin," a source told Hollywood Life. "But Taylor has set some boundaries which include no talking about Justin."

"Taylor really cares about Sel but she doesn't want to be an enabler when it comes to Justin," the source added. "Taylor has spent countless hours giving her support and advice but that's it. She will always be there for Sel but isn't giving any more advice on the matter. If Selena has any issues, Taylor suggested that she speak with a therapist because she doesn't want to get in the middle of it."

The on-again, off-again couple reportedly first reunited last weekend in Canada while celebrating Bieber's dad, Jeremy's birthday and a family friend's birthday. According to a previous report by Life & Style magazine, Swift was doing her best to help the singer move on and even tried setting her up with other guys like Niall Horan from One Direction.

Swift was even encouraging the "Come & Get It" singer to write down her feelings about Bieber and turn it into a diss song.

"Taylor's been encouraging Selena to write down all of her feelings and emotions and record," a source told the magazine. "Selena has already written a few slow, sad breakup songs, and she definitely discusses Kylie and being betrayed by her."