Question: What is the nationality of the singer who beat out Pour Some Sugar on Me by Def Leppard for the top spot on the US Billboard Hot 100 chart?
Sentence (from "Richard Marx"): He had a stream of hit singles in the late 1980s and 1990s, including "Endless Summer Nights," "Right Here Waiting," "Now and Forever," "Hazard" and "At the Beginning" with Donna Lewis.
Relevant evidence: No