Justin Bieber is reportedly a fan of his Selena Gomez's music video for Come & Get It and he reportedly gave his rumored on-again girlfriend a compliment about how she looks in the clip.

A source close to the 19-year-old Beauty and a Beat singer said, "Justin told Sel how hot he thinks her new video is. He said that he loves her music too."

"He is working hard to be a gentleman. He knows her music is important to her, so he's being really nice to her about that," the source added.

Gomez's music video for Come & Get It debuted this week. The track is off her upcoming album Stars Dance, which is the same name as her first solo world tour that she kicks off in August. Bieber is also promoting his music, traveling the world for his Believe world tour.

As the couple begin to work on their relationship, a different insider told Hollywood Life that Bieber is owning up to his mistakes. He reportedly admitted that he needs to work on being more mature. For the relationship to work a second time around and "reach its full potential," Bieber is "working overtime and even showing some major humility," according to the insider.

Bieber also admitted that "he has a lot of growing up to do."