If we could bottle Taylor Swift's girlfriend appeal and sell it we'd be very rich women indeed. It's not the quantity of boyfriends that the country music star has acquired over the last four years (although six is a pretty impressive number) but the quality. All of her rumoured former squeezes have been A-list actors, best-selling musicians or socialites related to former American Presidents. Now the pop star appears to have pulled off the ultimate boyf coup and bagged herself one of the world’s most lusted after bachelors, curly haired lothario Harry Styles.

Part of us is devastated that Harry isn't dating Cara Delevingne, but we've got to give Taylor props for capturing Hazza's heart. She and the 1D star are thought to have got together earlier this year before the he was spotted snogging another girl. Since then Taylor had a little summer romance with Conor Kennedy and Harry pursued and wooed Cara. But with the catwalk star spotted hanging out with Justin Bieber at the Victoria's Secret show earlier this month it was only a matter of time before Harry made his next move.

Sources backstage at The X Factor US, where Taylor performed last week, saw the new couple holding hands and flirting. And it wasn't just body language that made us think that Taylor is smitten, her latest style transformation speaks volumes. She wore skinny trousers, flat shoes and a trilby – a look that’s way more in keeping with Harry’s casual London style than her usual sparkly stage costumes – and not that dissimilar to an outfit worn by his ex Cara either. When the singer dated Conor Kennedy her retro 1950s makeover was the talk of Grazia HQ, but it seems that wasn’t the only Swift (geddit) relationship when she matched her look to her man.

Scroll through the gallery to see Taylor Swift’s relationship makeovers >>