unintentional but yeah

HAHAHHA. I dont think he meant it as it sounds.
But I guess he wasnt happy, they're making him post links on his twitter.

It's funny. I love both of em.

Some of you will never get UK humour. Cheryl is a huge megastar in the UK and so him downplaying her like that is meant to be the joke.

Not really, I don't think Cheryl is really known outside the UK.

He's joking. He's saying it in a way like "You obviously all know who she is really". It'd be like an American artist referring to another local American artist like Taylor Swift.

No, you're taking it too literally. Liam has a sarcastic SOH and this is an example.