"Song 4 Mutya (Out of Control)" is a song produced by British music duo Groove Armada, featuring vocals by recording artist Mutya Buena. Initially intended to feature British singer Estelle, the duo ultimately decided to collaborate with Buena on the song following her departure from girl group Sugababes in December 2005. Supported by a new wave-inspired beat, dance synthesizers and a bass line, it is an uptempo electronic and electropop song.