Christina Aguilera's son refused to go near his mother when she wore a long wig.

The Dirrty singer had to don the fake hairpiece for her role in new movie Burlesque but when she came home wearing it, two-year-old Max didn't recognise her.

A source said: "Max was really confused and he didn't want to go near her."

While Christina couldn't understand what was the matter, her husband Jordan Bratman told her to take of the fake locks to stop upsetting their son.

The source added to the National Enquirer magazine: "As soon as she did, Max ran up to her and gave her a big hug."

While young Max wasn't keen on seeing his mother with a different look, Christina recently revealed she plans to show him her raunchy pop video for Dirrty when he's old enough.

She said: "He'll see all of my work, I'm sure. But I think that's also a part of what I want him to appreciate in women - the fact that sexuality is not something you should be ashamed of.

"The more you try to forbid something and keep it secret, the more it becomes this thing you should be fearful of."

In the video, Christina appears in leather chaps and bares her midriff.