Contestants are judged on the performance of two songs in two separate rounds, each lasting 60 seconds, with the singers pretending to play an imaginary guitar.
Passion is a must, but much of the rest is up to the contenders. Props and costumes are allowed, but backup bands and real instruments are off-limits.
The two-hour final pitted 2024's winner, Canada's Zachary "Ichabod Fame" Knowles, against eight national champions and seven contenders who emerged from the qualifying rounds. The challengers included US champion Saladin "Six String Sal" Thomas and German champion Patrick "Van Airhoven" Culek.
The winner was chosen by a five-member jury of performing arts professionals. The winner received an actual guitar — a "Flying Finn" made by Finnish guitar maker Matti Nevalainen.
The championships were first held in 1996. Their organisers state that "according to the competition ideology, wars will end, climate change will stop and all bad things will vanish when all the people in the world play the air guitar."
Contestants may, according to the rules, "use an electric or an acoustic air guitar, or both".
The jury takes into account "originality, the ability to be taken over by the music, stage presence, technical merit, artistic impression and Airness".