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?

Context articles: Houston College Classic
Kora Temple
The AXIS
East–West Shrine Game
2010 East–West Shrine Game
Shriners Hospital for Children (Portland)
Planet Hollywood Las Vegas
North–South Shrine Game
2012 East–West Shrine Game
Shriners Hospital-Canada

The Shriners Hospitals for Children College Classic is an annual six-team college baseball tournament held in Houston and hosted by the Astros Foundation.
 The 15th annual tournament was held at Minute Maid Park in March 2015.
 It was initially called Astros College Classic from 2001 through 2002, the Minute Maid Park College Classic from 2003 through 2007, and the Houston College Classic from 2008 through 2015.
 In December 2015, the Astros Foundation and Shriners Hospitals for Children announced a multi-year naming rights agreement for the tournament, rebranding the event the Shriners Hospitals for Children College Classic.
The Kora Temple is an historic Masonic building at 11 Sabattus Street in Lewiston, Maine.
 The temple was built in 1908 by the Ancient Arabic Order, Nobles of the Mystic Shrine.
 The Shriners are a fraternal organization affiliated with Freemasonry and are known for their charitable works such as the Shriners Hospitals for Children which provide free medical care to children.
 The Kora Temple serves as a ceremonial space and clubhouse for the Shriners.
 The temple building was added to the National Register of Historic Places in 1975 for its distinctive Moorish-inspired architecture.
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 venue hosts a variety of events from charity benefits, concerts and award shows.
 It is used frequently for the beauty pageants : Miss Universe, Miss America and Miss USA.
 Since 2007, the auditorium has been the home to Justin Timberlake's annual concert to benefit the Shriners Hospitals for Children.
 In 2011, it was voted as one of the "Best Concert Halls & Theaters In Las Vegas".
 It is the largest theatre of its kind in the United States.
The East–West Shrine Game is an annual postseason college football all-star game played each January since 1925.
 The game is sponsored by the fraternal group Shriners International, and the net proceeds are earmarked to some of the Shrine's charitable works, most notably the Shriners Hospitals for Children.
 The game's slogan is "Strong Legs Run That Weak Legs May Walk".
The 2010 East–West Shrine Game was the 85th staging of the all-star college football exhibition game featuring NCAA Division I Football Bowl Subdivision players.
 The game featured over 100 players from the 2009 college football season, and prospects for the 2010 Draft of the professional National Football League (NFL), as well as for the United Football League's inaugural draft.
 In the week prior to the game, scouts from all 32 NFL teams attended.
 The proceeds from the East-West Shrine Game benefit Shriners Hospitals for Children.
The Shriners Hospital for Children is a 29-bed, non-profit pediatric hospital located in Portland, in the U.S. state of Oregon.
 It specializes in orthopedics, cleft lip, and palate disorders as part of the 22-hospital system belonging to the Shriners Hospitals for Children.
 Established in 1923, the current campus opened in 1983.
 The hospital is located on the Oregon Health and Science University campus, and is active in the research and development of new technology.
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.
 It is owned and operated by Caesars Entertainment Corporation.
The North–South Shrine Game was an annual postseason college football all-star game played each December from 1948 to 1973 in Miami, and a final time in 1976 in Pontiac, Michigan.
 The game was sponsored by the fraternal group Shriners International, with proceeds used to support the Shriners Hospitals for Crippled Children.
 The full name of the game when played in Miami, as listed on programs, was the Mahi Shrine's North–South College All-Star Football Game.
The 2012 East–West Shrine Game was the 87th staging of the all-star college football exhibition game featuring NCAA Division I Football Bowl Subdivision players and a few select invitees from Canadian university football.
 The game featured over 100 players from the 2011 college football season, and prospects for the 2012 Draft of the professional National Football League (NFL).
 In the week prior to the game, scouts from all 32 NFL teams attended.
 The proceeds from the East-West Shrine Game benefit Shriners Hospitals for Children.
 Brad Childress and Bobby Ross were named coaches on December 19, 2011.
The Shriners Hospital-Canada (also known as Shriners Hospitals for Children Canada and Montreal Shriner's Hospital) is the Canadian branch of the Shriners Hospitals for Children network.
 It is located in Notre-Dame-de-Grâce, Montreal, Quebec, at 1003 Decarie Boulevard.
 It overlooks downtown Montreal, and is close to Montreal General Hospital of the McGill University Health Centre (MUHC) hospital network, with which it is affiliated.
 The previous site of the institution (at 1529 Cedar Avenue) had outgrown its facilities, and since it was surrounded by Mount Royal Park, it could not expand in that location.