Question: What role did this American singer, producer and actor, who sang in the album "Idlewild," play in "All Is by My Side?"
Sentence (from "Idlewild Blue (Don'tchu Worry 'Bout Me)"): "Idlewild Blue (Don'tchu Worry 'Bout Me)" is the third single released from hip-hop duo OutKast's sixth studio album, "Idlewild", and the first from the album that is sung by André 3000.
Relevant evidence: Yes