Here’s a POPS extra that you will want to know about. Yip Harburg wrote the lyrics and Harold Arlen the music for the best song in the last 100 years, Over The Rainbow. Now the Boston Pops is asking you to be part of the sing-along collage. To pay respect to the shared cultural heritage of the American Songbook, the Boston Pops is asking for video submissions of fans singing “Over the Rainbow” for inclusion in a video collage to be shown at Boston Pops performances throughout the season. Voted number one on the RIAA and NEA’s “Songs of the Century” list, Harold Arlen’s “Over the Rainbow” is an American Songbook selection that unites generations and ties the 2011 Spring Pops Season together—from the Opening Night Judy Garland tribute to the finale “Triple Crown” performance celebrating America’s Heartland. The signature Boston Pops sing-along has long been an audience favorite, so this year the orchestra is opening the sing-along to a national choir. Participants of all ages can submit video of themselves singing “Over the Rainbow,” by adding a video to YouTube and emailing a link and contact info to overtherainbow@bso.org. Videos will be featured on the Boston Pops YouTube channel, on the Boston Pops website www.bostonpops.org, and at Boston Pops performances throughout the season. All video submissions are due by Saturday, April 26, 2011.