Aquarium is the debut studio album by Danish-Norwegian band Aqua, released on 26 March 1997. Although the group had been together for three years under their original name Joyspeed, their only release under that name was a single called "Itzy Bitzy Spider". The album is best known for including the successful single "Barbie Girl" which went on to become a widely recognizable hit around the world, as well as the singles "Doctor Jones" and "Turn Back Time". The album was preceded by the single "Roses Are Red" followed by the single "My Oh My", which was released a second time in 1998.

The album's third single, "Barbie Girl", brought the group to international attention after reaching number one across Europe, Australia, and New Zealand. The song later peaked at number 7 in the United States. Its success helped the album reach number one in both the group's home countries, and make the top 10 in the UK and US. While not selling as highly "Barbie Girl", the album's fourth single, "Doctor Jones", was released in late 1997 and became a number one hit in Australia and the UK. "Turn Back Time" would later give the group their third consecutive number-one single in the UK despite reaching only number 16 in Denmark. The final single, "Good Morning Sunshine", failed to chart highly and was only released in select regions like the earlier "Lollipop (Candyman)", the group's only other song to chart in the US. The album has sold 14 million copies worldwide.