The KOL Secret Slumber Party premiered on September 16, 2006, replacing Nick Jr. on CBS (a block programmed by Nickelodeon, CBS' former sister property under Viacom ownership). Its inaugural lineup included two first-run programs (Cake and Dance Revolution), one that originally aired as a syndicated program as part of the DiC Kids Network block in 2005 (Horseland) and three pre-2006 shows (Liberty's Kids, Trollz and Sabrina: The Animated Series). The block's de facto hosts (and in turn, from whom the Secret Slumber Party name was partly derived from) were the Slumber Party Girls, a teen pop group signed with Geffen Records (composed of Cassie Scerbo, Mallory Low, Karla Deras, Carolina Carattini and Caroline Scott), who appeared during commercial break bumpers and interstitial segments seen before the start and the final segment of each program as well as serving as the musical performers for one of the series featured in the block, Dance Revolution.