Question: In what year did a mid-sized auditorium, owned and operated by Caesars Entertainment Corporation first host Justin Timberlake's annual concert to benefit the Shriners Hospitals for Children?
Sentence (from "Planet Hollywood Las Vegas"): Planet Hollywood Las Vegas (formerly Tally-Ho, King's Crown and Aladdin) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada.
Relevant evidence: No