"Keep the faith" is the fifth overall single by Japanese boy band, KAT-TUN, and the second from their third studio album, KAT-TUN III: Queen of Pirates. It was released in three editions with three different covers; the regular edition contains all the songs and its instrumental versions, the first press edition came with a bonus track entitled "Lovin'U" and its instrumental track and the second limited edition was packaged with a DVD with the single's music video and a short film about the making of the music video.