By Saturday morning, rumours were swirling around Sefton Park - suggesting Ed Sheeran would be the "Secret Set" opening the New Music stage.
After it was confirmed on social media, fans rushed to the tent - but a few songs in, the area had "reached capacity".
Sheeran - who's spent the last couple of years selling-out massive stadiums around the world - said he wanted to play the smaller tent to feel the "energy" - and those lucky enough to be there loved the intimacy.
"He's the biggest artist in the world" for fan George, who described it as "a mental pull - the fact they managed to get him for a secret set".
But for those shut out after the area was closed like Kate, 20 and Scarlett, 19, it was disappointing he wasn't on the Main Stage, where more fans could have seen him.
"I messaged my mum when it got announced," Kate tells Newsbeat.
"Her and my sister were so jealous, and I was like, 'I'll send you videos!', but I'm not going to be able to."