Bostonsmarts.com has this to say by way of a preview:
Elvis Costello and the Imposters
Having a ticket to see Elvis Costello and the Imposters might afford you the opportunity to determine his set list. Lucky audience members will be invited onstage to spin "The Spectacular Spinning Songbook." This wheel contains 40 song titles, including names of Costello's biggest hits, rarities, and covers. Whatever song the wheel lands on gets played by Elvis and the Imposters.
Anyone here have tickets yet?