"Pjanoo" (pronounced [ˈpjɑ̌ːnʊ]) is a keyboard-based house track by Swedish DJ and producer Eric Prydz.

Outside Sweden, "Pjanoo" peaked within the top ten of the charts in various other European countries, most notably the United Kingdom, where it peaked at number two on the UK Singles Chart behind Katy Perry's "I Kissed a Girl", topped the UK Dance Chart for ten non-consecutive weeks and received moderate airplay amongst British radio stations, being heavily used by BBC Radio 1 in advertisements for their "Radio 1 Big Weekend" and "Weekend in Ibiza" events.

The song has been on promotional release since 17 March 2008[2] with Eric Prydz's own label, Pryda, with a limited number of 12" pressings available on special order.

[3] Despite showing overall resentment towards Prydz, Pitchfork nonetheless conceded that the song was "one of the year's best dance tracks".

The main rhythm was sampled in the intro of the 2020 song Hypnotized Purple Disco Machine and Sophie and the Giants [40]