Lorde has revealed that she is "really proud" of her upcoming Disclosure duet.

The 17-year-old New Zealand starlet is due to perform live with the British duo at tomorrow night's (February 19) BRIT Awards.

Speaking to Capital FM, the 'Royals' star confirmed that they have now met up for rehearsals and that she is truly excited about the collaboration.

Lorde said: "I had actually never met them before we rehearsed, but I am a huge fan of the record, and it was just one of those things. The BRITs were like 'Would you be open to this?' and I was like, 'Yes, this is so my thing!'.

"[It's going] really great. I think it's going to be pretty [special]. It's definitely, I'm really proud of it. They have been super easy to  work with and they're fun and stuff, so it's been sweet."

The singer added that 'Help Me Lose My Mind' is her favourite Disclosure track.