The portrait of Lily Allen from the cover of her hit album 'West End Girl' has gone on display at the National Portrait Gallery in London. The painting, by Spanish artist Nieves Gonzalez, shows the singer sitting on a stool wearing a polka dot puffer jacket and boots, revealing a tattoo on her left leg. Allen described the portrait as 'a savage and startlingly detailed portrait of a marriage being torn apart'. The National Portrait Gallery's collection includes likenesses of famous figures from William Shakespeare to Queen Elizabeth II, and from Charles Darwin to Adele.