I think the title itself has to be a question, it can't just have a question in the lyrics. Otherwise, "Dear Prudence, won't you come out to play?" would make it onto the thread.
Tony Orlando had a couple: Who's In The Strawberry Patch With Sally? Say Has Anybody Seen My Sweet Gypsy Rose?
Did They Ever Tell Cousteau? - Esbjörn Svensson Trio But Who Was Fulcanelli? - Frank Zappa Moses? I Amn't - Mogwai Is Vic There? - Department S
Bongi and Nelson - Do You Remember, Malcolm? A single about Malcolm X by Bongi Makeba, Miriam Makeba's daughter, and Nelson Lee, only released on the Guinean label Éditions Syliphone Conakry in 1971.
Joe Ely - Are You Listenin' Lucky? From his album "Lord of the Highway", released in 1987 on Hightone Records. "Are you listenin' Lucky? Are you listenin' Lucky? Are you listenin' Lucky? She used to be your heart and soul"