Justin Bieber and Selena Gomez are reportedly back together, to no one's surprise.

The "Come & Get It" singer and the 20-year-old pop star hung out over the weekend and attended video director Alfredo Flores' birthday celebration at Bootsy Bellow, according to Us Weekly.

"They spent all day riding together on a Can-Am Spyder on Sunset Boulevard. Justin drove while Selena sat on the back holding on to [him] . . He was incredibly sweet with her and they looked super happy and in love," a source told the magazine.

Justin Bieber and Selena Gomez began dating back in 2010 and have been on-and-off ever since, according to L.A. Times.

"It is always on-and-off. 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," a source close to Bieber stated.

21-year-old Gomez reportedly told her family that she's back with Bieber because he's cleaned up his act, according to TMZ. Her family and close friends are reportedly not too happy about the reunion.

Bieber has continuously been in the headlines for some sort of unacceptable behavior this past year.

Most recently, a video of the "Baby" singer reportedly using the N-word and making racial jokes when he was 14 or 15 surfaced. The troubled star has since apologized twice.

A handful of stars, including Usher, have stood by Bieber's side after the videos leaked.

Miley Cyrus recently gave her thoughts on the behavior of Justin Bieber as well during her interview with Richard Wilkins on The Today Show, according to Yahoo Celebrity U.K.

"I think people should have time to grow up and figure out who they are," stated Cyrus.

She added, "I think people need to sit and think of the times in their lives they were not proud of who they were. Imagine if that was completely exploited and everyone had their opinions."