Is there trouble in paradise?

After lunching at a studio in Studio City, CA yesterday (May 2), lovebirds Miley Cyrus and Justin Gaston were seen engaging in a heated fight about their relationship.

Following the May-December couple’s verbal battle, Miley put her game face on as she performed at the Hard Rock Cafe in Citywalk Universal Studios. Her entire family was on hand to watch the 16-year-old pop star do her thing. Suspiciously, there was no sign of her 20-year-old underwear model boyfriend.

So what could Miley and Justin be spatting about? It appears Miley has grow increasingly close to young British actor Gregg Sulkin. The two young stars reportedly met at a party thrown by Disney studios earlier this year. They kept in touch ever since and recently reunited in London while Miley was promoting Hannah Montana: The Movie.

According to pals, the pair are ready to come clean about their romance. “Miley thinks Gregg is just awesome. She’s taking it one step at a time but they both would love to make a proper go of it,” a source tells Britain’s Daily Star. “They are still really very young. It’s all quite sweet, really. The thing with Justin wasn’t that serious – but with Gregg it could be for keeps.”

Dad Billy Ray Cyrus is also a big fan of Gregg and thinks he is “good for Miley.”