Now that Cheryl's got herself a fancy new boyfriend in the form of Liam Payne, she'd really quite like to avoid the inevitable rumours that he's cheated to start doing the rounds.

Which is exactly why she's been reportedly 'begging' him to keep the partying to a minimum, particularly with his One Direction BFF Louis Tomlinson, who's no stranger to a scandal or two.

"Cheryl's been in the studio working on new music practically day and night since she arrived in LA. And she's begged Liam to do the same. They're writing songs together, and she told Liam they'll get a lot more done if he keeps the partying down," a source told Heat mag.

Adding: "Of course, she knows he'd never cheat on her, but I think she's worried about all the attention he might get if he's out with Louis. If Liam's even so much as pictured with another girl, it would start rumours."

But it looks as though LiLi's totally on board with the whole thing, happily sitting back all in the name of Chezza's happiness. Aww.

"Liam was invited out to 1OAK nightclub last week for a producer mate's birthday, but he skipped the party to go to the studio with Cheryl. He's really serious about her and doesn't want to do anything that could jeopardise the relationship," the source continued.

Chiam forever.