Allegedly pop star Miley Cyrus has issued a stern warning to Emma Roberts to keep her hands off her man - Liam Hemsworth

Miley Cyrus was not very pleased when Emma Roberts walked onto the sets of Empire States and bragged about being single and ready to mingle. Roberts plays the love interest of Cyrus' fiancé Liam Hemsworth in the upcoming film and Cyrus is reportedly not very pleased with the on-screen canoodling.

"Miley's become super-protective since she and Liam got engaged. She's worried that while he's off making movies with hot women, he'll be tempted to cheat. And it didn't help that Emma showed up on set declaring that she is single and ready to mingle." an insider revealed to Celeb Gather.

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Cyrus and Hemsworth announced their engagement early June and ever since the two have bagged the lime light on many occasions. Hemsworth is currently in New Orleans shooting for his film. The couple keep taking short trips from their busy schedules to meet one another. According to the insider, when Cryus flew in to New Orleans to spend time with her future husband, she was not too happy to learn that the Hunger Games star has been hanging out a lot with Emma Roberts during off work hours.

"Miley doesn't want Liam socializing with a loose cannon like Emma," the insider divulged. "She thinks the girl is bad news. Not only did she tell Liam it had to stop, she even confronted Emma, reminding her that Liam is off the market."

But Emma apparently isn't concerned. "She couldn't care less what Miley thinks," added the source. "She makes fun of Miley behind her back, saying she's just a washed-up tween star. Emma feels she has nothing to lose, so she's pushing it as far as she can with Liam. And he's definitely enjoying the attention."