Lorde has rubbished claims she lip synced on 'Saturday Night Live'.

Lorde

Lorde

The 'Royals' hitmaker took to the stage with Disclosure at the weekend to perform the song 'Magnets' from the electronic music duo's latest album 'Caracal' and she later took to her Twitter account to insist that while she's flattered people think she was faking it, she definitely wasn't.

She wrote: "wow - the fact that some people thought I was lip syncing on snl is an awesome compliment! goes without saying i have never/will never haha (sic)."

Disclosure were also joined by 'The Writing's On The Wall' singer Sam Smith for their song 'Omen'.

Lorde added: "so much [love] to @disclosure who i love supporting and @samsmithworld who i just plain love

"we're just a bunch of kids from far away places and we played on SATURDAY NIGHT LIVE! it's all a bit overwhelming and i'm crazy grateful (sic)."

Disclosure - who are made up of brothers Guy and Howard Lawrence - previously spoke about how down to earth Lorde was when they were recording 'Magnets' in the studio.

Howard said: "She turned up on her own, no management or bodyguard.

"That's the most equal collaboration on the record. You can really hear her sound -- she has this sassy yet vulnerable thing."