"Music Is the key" is a song by German singer–songwriter Sarah Connor, featuring guest vocals by American a cappella group Naturally 7. Written and produced by Rob Tyger and Kay Denar, it was released on 3 November 2003 as the lead single from Connor's third studio album, Key to My Soul (2003). The single peaked at number one on the German Singles Chart, becoming Connor's second number-one hit after 2001's "From Sarah with Love". It also reached the top ten in Austria and Switzerland.