In preparation for his guest-starring turn with the New York Pops for its concert Cheyenne Jackson's Cocktail Hour, Music of the 'Mad Men' Era, Broadway's Cheyenne Jackson performs Irving Berlin's classic "What'll I Do?," in rehearsal with guitarist Steve Bargonetti. Curated by Jackson and Pops musical director/conductor Steven Reineke, the concert will feature a broad selection of popular music from the late 1950s and early 1960s, as well as some more modern/retro surprises. To view the Jackson/Reineke interview, click here.