Adele, 24, has learnt some of the slower routines with her baby bump and her presence went unnoticed by the other students.
"Adele attended a line-dancing class near her home. She's got a love of country music from spending so much time in the US and Nashville so she thought it would be a good laugh to go along with a few friends.
"It was a pretty elderly class so the pace of it wasn't too fast for her condition. The clientele didn't seem to notice who she was. She went pretty much unrecognised. They were more worried about getting the moves right than looking for the world's biggest-selling artist in the room," a source said.