Louisa Johnson performed on this weekend's Saturday Night Takeaway.
Louisa lent her vocals to Frozen's Let It Go as Ant and Dec gave away more tickets to next weekend's live series finale from Walt Disney World in Florida.
It was the second of two performances from Louisa on the show.
The teenager had earlier opened the episode with her new single Best Behaviour, which is out to download now.
Speaking about the track recently, Louisa revealed it was her favourite from her debut album.
"It's very different from So Good and Tears but I think that's interesting. No one would really expect it and it's my favourite song on the whole album.
"I can never sit down and listen to an album that all sounds very similar, so I like to change it up. I've met some amazing people, especially songwriters who've written the biggest hits in the world."
Talking of Louisa's album, the teenager told fans this week it was still a "work in progress" ahead of a release later this year.
Chatting about what we can expect from the songs on the LP, Louisa teased this week: "There's another song with Clean Bandit, but this time it's me featuring them, which makes me feel cool.
"There are two more features on the album so far, but there could be more. It's a work in progress."
Louisa's performance on Ant and Dec's Saturday Night Takeway aired on ITV from 7PM.