The Girls Aloud star was allegedly taken to a North London studio to shoot a new shampoo TV advert.
"She looked tired and drawn but determined to put her work face on and to give a good performance," a source told The Mirror.
“Working keeps her mind off her turbulent private life. She's going to wash Ashley right out of her hair."
Cole was recently confirmed to perform a headline set at the V Festival in August.
> Cheryl Cole 'doesn't want Ashley's money'