"Dulce Locura" ("Sweet Insanity"), working title: Tu Luna ("Your Moon"), is the second single from the album Guapa by the Spanish pop/rock group La Oreja de Van Gogh.

The aforementioned musical bridge, was created because the producer Nigel Walker asked for it, and was written by Amaia in a kitchen recipe book, since she had no other place where she could write it at the time.

Though the company proposed that this be the first single of the album, it was not so; however, it got to be number one of Los 40 Principales on 14 October 2006.

[1] The video for this song was produced by "Struendo" again and was recorded in Toledo in an ancient palace from the 12th century.

In the video the members of the band play in a dark living room and in the chorus of the song, feather fly around in slow mode.