Aqua is a Danish Europop music group, best known for their 1997 multi-platinum crossover single "Barbie Girl". The group formed in 1989 and achieved crossover success around the globe in the late 1990s and early 2000s. The group released three albums: Aquarium in 1997, Aquarius in 2000 and Megalomania in 2011. The group sold an estimated 33 million albums and singles, making them the most profitable Danish band ever.[6]