Rumors have it that Selena Gomez and Justin Bieber have reunited once again after the "Baby" hit maker greeted his on-and-off girlfriend on her 23^rd birthday via FaceTime.

The 23-year-old "Come & Get It" singer, who recently celebrated her birthday in London, was reportedly surprised by Justin Bieber's sweet virtual serenade.

An insider from Hollywood Life said, "He started the conversation by holding out one red rose and pretended to give it to Selena through the screen. He knows Selena loves roses."

Justin Bieber also channeled his romantic side as he played his guitar and sang his version of Happy Birthday.

According to the insider, Selena Gomez was really happy with the "Beauty & a Beat" singer's greeting.

"It made her really happy. It was sweet," the source ended.

But it seemed like Justin Bieber is not the only man Selena Gomez has decided to rekindle a romance with.

According to The Daily Mail, Selena Gomez has also met up with her ex-boyfriend Nick Jonas recently.

The 22-year-old "Jealous" singer and the former Disney actress reportedly had a dinner date after a chance meet-up.

'It was nice to connect and just catch up," the Disney star said. "I'll just stop there."

However, Nick Jonas was quick to clarify that he and the "I Want You to Know" singer's relationship is just platonic.

"She's kind of like 'the homie' that make sense?" he said. "Because we worked together and we're just friends, it feels like it's that. I don't wanna mess that up; I just want to be friends with her I think."

Texas-native singer Selena Gomez has dated Nick Jonas previously but they broke-up twice before she had a relationship with "Boyfriend" hitmaker Justin Bieber.

After her split with the 21-year-old singer, Selena Gomez briefly dated German DJ and producer Zedd but she split with him last month.