"Hide and Seek" is the first single by Imogen Heap from her album Speak For Yourself. The song is performed without any other accompaniment than what is produced by a Vocoder harmonizerAuralgasms, http://www.auralgasms.com/Features/Imogen/default.aspx, creating an altered a cappella sound. It was featured in the second season finale of The O.C., on the second season of the TV series So You Think You Can Dance, during the final scenes of the premiere episode of the short-lived CBS primetime drama Smith starring Ray Liotta, and on the finale of episode "If Looks Could Kill".