(Cover) - EN Showbiz - Adele and Lily Allen love prank calling other musicians by pretending to be little boys.

The two stars both have a wicked sense of humour and enjoy making people squirm. Their favourite trick is to dial other celebrities in the music business late at night and put on strange voices, which Adele revealed Lily is surprisingly good at. Unfortunately, Lily is also good at heaping all the blame on Adele.

"Lily can't ever keep quiet and tells everyone it's me who leads her on to do them. It's not me it's her, she is so naughty," Adele laughed.

"We have called [singer-songwriter] Sam Sparro and pranked him. It was late and I was drunk. I don't remember a lot of it. Lily does a very good impersonation of an eight-year-old boy. Mine isn't so good."

The two stars chose to pretend to be a little boy because they knew it would be disconcerting. People never expect someone so young to be calling them at night and usually have no idea how to handle the problem.

Adele added the pair usually end up giving themselves away because they can't keep straight faces for long.

"People get concerned when a child is on the phone but they soon realise it's a joke. Usually because we both keep giggling," she added to British newspaper The Sun. (C) Cover Media