The `Not Fair` singer has been suffering from the unsightly skin blemishes since she was pregnant with her daughter Ethel Mary - who was born in November - and she has been covering herself in a special oil to try and get rid of them.
She wrote on her twitter page: "Stretchmarks are gross, but going to bed all greased up is not cosy. #torn (sic)"
While her pregnancy may have given her stretchmarks, Lily recently revealed it also gave her a brief but amazing talent - being able to shoot milk "10ft" from her breasts.
British journalist-and-broadcaster Caitlin Moran asked Lily - who had been nursing little Ethel - on twitter: "What`s your milk-pressure like? Can you use your ti*s like guns? I used to be able to hit things ten feet away."
To which the pop star - who married husband Sam Cooper last year - replied: "@caitlinmoran are you talking about my let down reflex? if so, pretty good, yes 10 ft sounds about right. (sic)"