American rapper Kesha has added to her body art by having the words 'Suck it!' tattooed on her bottom lip.

The 25-year-old posted a pic of the painful looking ink work on her Twitter page with the caption "New tatt!!"

She reportedly got the tattoo – her sixth – done at Alchemy Tattoo Parlour in Los Angeles late on Tuesday night.

The last time the singer caused a stir on the social networking site was in April, when she posted a picture of herself urinating in the street.