Question: who sang oh happy day in sister act

title: Ryan Toby
text: While enjoying the success of working on the Will Smith project , Ryan ran into his old manager Marvin Thompson again . Thompson was working with an artist signed to Wyclef Jean 's Booga Basement / Interscope Records label . Jean invited Ryan to sign with his label when his deal with Jazzy Jeff expired . Ryan was partnered with Robby Pardlo by Thompson . Nevertheless , Wyclef heard a female voice on some of their demos , Claudette Ortiz . Wyclef decided that he wanted Ortiz to join the group so he could create another Fugees . Ryan , Robby & Claudette named the group City High . The self - titled debut album released in 2001 garnered a Grammy Nomination . The albums sold millions worldwide and the threesome toured for approximately two years .