T in the Park performers Be Charlotte said things went "a little bit crazy" after One Direction's Louis Tomlinson gave the group a shout-out to his 22 million Twitter followers.
The Dundee musicians made their debut at the festival on the BBC Introducing stage on Saturday.
They were given a boost by celebrity fan Louis who got Be Charlotte trending on Twitter before they even took to the stage.
His tweet has now been liked 63,000 times and retweeted 32,000 times.
Charlotte Brimner, 18, said: "So last week Louis Tomlinson followed me on Twitter and that kind of sparked a bit of a frenzy thing going on. It just made me realise how insane all this is.
"And today before I went on stage he shared our BBC Introducing session and it's just gone a little bit crazy. I don't really know what to say."
Speaking about their performance, the singer said: "I think there's always a fear of playing festivals because you never know if anyone's going to turn up or what's going to happen.
"But I really like that element to it as well, it makes it even more exciting when it comes right. It was a really nice audience and it really felt like everyone got what we were up to."
The group's James Smith said he used to come to T in the Park as a regular festival-goer when he was younger.
He said: "The last one I went to was in 2006, which was The Who and I was maybe 11 or 12 at the time, so to come back and play it seven or eight years later is quite spiritual.
"For Scottish musicians to play it - it's like the holy grail, festival-wise."