"Castles in the Sky" is a song by Belgian dream trance group Ian Van Dahl, featuring Marsha. It was released in Europe in May 2000, followed by a worldwide release in 2001. The song was a modest success in Europe, but was a huge hit in the UK, peaking at number 3 on the UK Singles Chart and number 1 in Scotland.

There are two different videos for the song, both of which feature Cindy Mertens miming to Marsha's vocals. The first uses the regular radio edit, and shows a selection of dancers in an underground sewer. The second video uses the Peter Luts radio edit and features clips of an instrument being played amongst clips of the original video.

^{^}shipments figures based on certification alone

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