Harry Styles reveals his inner grammar pedant during One Direction gig

The singer stopped to correct a fan's sign

The One Direction singer singled out a fan (Getty Images)

Harry Styles: One Direction singer, style icon, heart throb for teenagers globally and, apparently, grammar pedant.

Styles took a moment out of a gig in Philadelphia to correct a fan who made a classic your/ you’re error in their sign, which read: "Hi Harry your so nice."

Spotting the mistake, he beckoned for the perpetrator to pass it over, grabbed a marker and added in the missing apostrophe.

The look on his face as he held it up said it all.

The 21-year-old was later bottled on stage by an over zealous fan, prompting his mum to scold One Directioners for chucking objects at the band in a string of furious tweets.