British pop star Lily Allen has donned drag for a men's magazine and doled out advice to members of the opposite sex.

The Smile singer has posed for the cover of U.K. men's magazine ShortList wearing boxer shorts, a white vest and a tie, with a cigarette hanging from her mouth.

She also guest edited the publication's How To Be A Man issue, and revealed her top tips for readers, branding vanity the worst trait among the male population.

Allen urged readers to follow in the footsteps of her husband Sam Cooper by shortening the amount of time they spend on their appearance and giving up aftershave.

She says, "I like that when my husband gets up in the morning he spends about 12 seconds looking in the mirror then leaves. I'm not into men who are vain or even wearing aftershave. It gives me shivers. Men should be men. Go out, earn some money, come back and look after my children."