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It's not every day you spot Seal strumming his guitar under a tree in Piccadilly Gardens.

But that's exactly what happened this lunchtime as the London-born superstar, in town to play a gig at the Bridgewater Hall tonight, performed an impromptu set for stunned passers by in Piccadilly Gardens this afternoon.

Excited social media users were quick to post footage of the singer as he belted out his biggest hit, Kiss From a Rose.

Fans couldn't believe their eyes as they sang along to the famous love song as Seal, dressed in double denim and white trainers, even had a basket for loose change collections.

Video by Nick Speakman

(Image: Nick Speakman)

Shoppers and workers enjoying their lunch break were amazed as the Crazy star casually appeared out of the crowds to chat to a busker who was already at the well-known spot in the city centre.

One person who saw Seal tweeted: "Seal just casually showed up in Manchester and made this busker's day."

Not to worry Nadia, just watch the video above...