Taylor Swift proves why she's such a good friend

Taylor Swift and Karlie Kloss are best friends - but which of them is the best, best friend?

To find out, and to mark their joint cover, US Vogue put the two through a series of challenges including a staring contest, drawing competition, talking round and (best of all) an arm wrestle.

Swift has had a busy week: As well as Vogue she's invited a fan backstage at the Grammys just for a hug, made a playlist for a heartbroken fan, released the video for her new single, Style, and best of all, wished the "all the lonely Starbucks lovers" a happy Valentine's Day on Twitter - a nod to one of the most misheard lyrics from Blank Space.

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