Question: Who replaced the singer in S Club 8 and The Saturdays as a host of The Xtra Factor?
Sentence (from "Rochelle Humes"): Rochelle Eulah Eileen Humes (née Wiseman; born 21 March 1989) is an English singer and television presenter, best known for her work in pop groups S Club 8 and The Saturdays.
Relevant evidence: Yes