But we don't think Justin Bieber needs to worry
Ah Selena Gomez you wiley minx-girl, are you not content with having one world famous pop star as your boyfriend? Selena has admitted she's got another crush on another pop star, which is enough of a revelation to send her boyfriend Justin Bieber into a frenzied whirlwind of jealousy.
Or he might not hear about it and might not be bothered, seeing as he's always gobbing off about how fit Cheryl Cole is.
"I'm obsessed with Bruno Mars," says Selena, or S-Gome as we're trying to introduce her. It's not catching on.
"I really think he's extremely talented.
"I kind of have a crush on him."
So there we have it.
Do you think Justin will get his knickers in a twist about this?