Lily Allen has become a Justin Bieber fan.

The Smile singer admits that Bieber Fever has finally hit her – and she can’t get his latest single Baby out of her head.

“I have to say I’m LOVING Justin Biebers Baby today,” Allen confessed on Twitter.

“Printing up lyrics and planning on dancing round my office singing it all afternoon.”

Miley Cyrus on the other hand isn’t too keen on Justin’s music. She recently admitted: “I’m not necessarily a fan. I don’t listen to that kind of music.”

Anyone out there who doesn’t have Bieber Fever?! Other than Miley of course…