The 'Smile' singer sizzles in the iconic magazine's June issue, where she chats about upcoming album Sheezus and why her dad inspired her showbusiness career.
Showing off three very different looks, the British singer is celebrating her return to the music industry since she first launched her career eight years ago.
And in true Lily style she hasn't been quiet about her return, raising eyebrows by naming her album Sheezus, a play on Kanye West's Yeezus record title.
"Because Kanye West, who I'm a massive fan of, had an album called Yeezus. I respect him for many different reasons, not just his music but also as a personality. He is always open, honest, true to his word, and doesn't give a hmm-mmm what anybody thinks. If that makes him Yeezus, then I sure as hell will be Sheezus."
Lily, 28, told the magazine she was inspired to enter showbiz by, unsurprisingly, her actor father Keith.
"My dad's an actor, and he took me on location once when he was shooting a film. He must have been really hungover, because his assistant came, woke him up, pulled him out of bed, gave him a cup of coffee, ran him a bath, then got him dressed and put him in a car. I was like, 'That's cool. I'd like to live like that.'"
Since finding fame, Lily has married boyfriend Sam Cooper and the couple are parents to daughters Marnie and Ethel so perhaps it's no surprise Lily admitted that organisation is key to her daily life.
"I can't go to bed until I've ticked off everything on my list in my notes on my iPhone or until I've finished my flagged e-mails. There's probably eight or nine things a day, on average. I know I can go to bed when I've done the last flagged thing."
Lily's interview appears in the June issue of Cosmopolitan US, on newsstands from 6 May.
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Watch Lily's music video for 'Our Time' below: