Ingrid Chavez, a poet and songwriter, had to sue for a songwriting credit alongside Lenny Kravitz on what song that peaked at #1 during the first week of 1991? The song was already mired in controversy for its music video and for Kravitz having used an unauthorized sample from Public Enemy's "Security of the First World" on its drum track.
(Neither Kravitz nor Chavez is the song's credited performer.)
"Justify My Love"