Ariana Grande has been spotted in Glasgow city centre by eagle-eyed fans ahead of her massive show at the SSE Hydro.

The 'Thank U, Next' superstar left fans in meltdown yesterday after posing for pictures in the city's George Square.

She stopped to chat to fans and take selfies before she performs in front of thousands tonight.

READ MORE: Everything you need to know about Ariana Grande's Hydro gig tonight

The chance encounters come just weeks after the singer cancelled her VIP meet and greets ahead of her Glasgow show.

An email sent to fans said she had to pull out of the sessions to 'preserve her voice' - and Ariana said on Twitter she would rather 'meet fans for free' while shopping.

Lucky fans have taken to Twitter and Instagram to share their images of the star - with some calling it the 'best day' of their lives.

One claimed her managers had bumped into the singer in a pub... 

And fan accounts dedicated to the star have been sharing pictures of lucky fans who happened upon her last night. 

Grande is set to perform at the SSE Hydro tonight, and fans will be let through the doors at 6.30pm.