The address for Greenhill School is 4141 Spring Valley Rd, Addison TX. However the concert will take place in the Marshall Family Performing Arts Center which is located in a different part of campus than where a GPS will take you for the above address. The entrance for the MPAC is located on the Northeast side of campus on Hornet Road off of Midway Road. You can type "Marshall Family Performing Arts Center" into Google Maps. Click Here For The Location In Google Maps. Additionally, here are some maps to aide you: