Hansen Charts has worked with Hark Up Music since 2008 when HUM became a 501(c)3 organization.  HUM performs some 50-70 events each year with a full blown Christmas Show the first week in December which is attend by 3000+. You can check out some of their YouTube Videos here:

https://www.youtube.com/channel/UCpquIaaUy0aeaSRM9EVTtCg