Taylor Swift gave a fan fashion advice.

The teenager, who goes by the username SwiftRomantics on the blogging website Tumblr, used the platform to ask his followers what he should wear to his prom, with the 25-year-old musician surprising the fan by giving her own tips.

Alongside a photo of him posing in two different looks, he wrote: ''So prom is on Thursday and I need to know, tie or bow tie?''

Surprising the schoolboy with her response, the 'Shake It Off' hitmaker suggested he wore the tie to look like a ''modern movie star'', also complementing him on his sharp suit.

Spotting the post online, she replied: ''I like the tie but honestly both are great. I just feel like you look like a 50's movie star in the bow tie, but more like a modern movie star in the tie.

''Depends on what vibe you're wanting to convey but I'd say the tie. Great suit btw! (sic)''

And while Taylor is happy to dish out style advice, she previously revealed she turns to pals Lena Dunham and Zooey Deschanel for inspiration when it comes to her own outfits.

She said: ''For fashion inspiration... Lena Dunham always has great websites and shops at great stores. She always tells me her newest obsession, whether it is a new website, a blog or a store, she's really good with that stuff. And Zooey Deschanel is one of the most fashionable people I know.''