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?
The AXIS: The AXIS (known as The AXIS powered by Monster for sponsorship purposes, also referred to as the AXIS Theater) is a mid-sized auditorium located at Planet Hollywood Las Vegas on the Las Vegas Strip. The AXIS:  Since 2007, the auditorium has been the home to Justin Timberlake's annual concert to benefit the Shriners Hospitals for Children.
i don't know