Keith Lockhart, the Boston Pops Orchestra, and The Swingle Singers, a celebrated a cappella troupe, perform tunes from the more recent pages of the American Songbook at Symphony Hall, June 7, 9, & 10. The orchestra and the multi-Grammy-winning vocal group will perform the music of Joni Mitchell, Carol King, and the Beatles, along with the music of other American Icons who have scribed the modern classics in the great American Songbook. The set list will include a surprise rendition of one of The Swingle Singers’ songs featured on the first season of the smash-hit television show Glee. The audience gets a chance to chime in as well, when Maestro Lockhart cues the crowd for Celebration: A ’70s Sing-Along, featuring songs by Jimmy Buffet, Kool and the Gang, and more. These performances also feature Boston Pops bass trombonist Douglas Yeo in a selection from Dave Brubeck’s concerto James Brown in the Twilight Zone for bass trombone and orchestra and the premiere of two new Pops arrangements for orchestra: Queen’s “Bohemian Rhapsody” and Stevie Wonder’s “Sir Duke.” While in town, The Swingle Singers also make a cameo appearance at the 30th annual Presidents at Pops performance featuring Katharine McPhee, the star of NBC’s recently announced new musical drama Smash on Wednesday, June 8, 2011.