"We were amazed by what the judges said - we were very pleased with how they saw our performance.
"We sent the song on the last day of the competition - and they called the next day to say, 'wow, we like your song'."
Judge Nile Rodgers: "The vibe, the energy was great. A big, chunky guitar sound. And they are fine looking too, which also counts."
There was a tie for second place, with 19-year-old UAE singer Jeremie Johnson and Serbian collective Vrelo sharing the spot.
The judges said Johnson had "the potential to go on and be a world star," while Vrelo were "fantastic" and their sound "an assault on the eardrums".