Kat Dennings dyed her hair with coffee (and other weird celebrity beauty treatments).

Kat Dennings, star of the comedy sitcom Two Broke Girls, confessed to talk show host Jimmy Fallon on Monday night that she recently tried to dye her hair…using a mixture of coffee sachets and conditioner.

Despite the best of intentions, Dennings said the treatment did nothing to alter the colour of her hair but it did come with one unexpected side effect: it smelt delicious for a week.

Chin up Kat, I think we’ve all been guilty of trying a little cost cutting when it comes to our beauty routines.

I don’t know about you but I draw the line somewhere between vampire facials and vagina steaming when it comes to acceptable beauty routines.

Lady Gaga is a bit fan of 'out there' beauty trends. Image: Instagram

What's the weirdest thing you've tried in the pursuit of beauty?