Cherry Cherry Boom Boom—the nom de pop of producer and impresario Martin Kierszenbaum—has a keen eye for up-and-coming, far-flung talent: He boosted Lady Gaga toward superstardom on her breakthrough The Fame and helped the provocative Russian duo t.A.T.u. make headlines with the urgent “All the Things She Said”. His work with pop royalty like Madonna and Mylène Farmer uses 21st-century flourishes to showcase their storied talents.