In a prank for the BBC, Adele (the real one) puts on a fake nose, fake chin, different make-up and auditions alongside other Adele impersonators. She really has a good time with this one. 

Adele pretends to be a Nanny, Jenny - and as she and the other impersonators wait to go on stage, they chat a little.

'Jenny' says that she's been impersonating Adele for about 4 years now. Everyone is fooled until she sings. Then the gig is up and the reactions are priceless.