These pop titans are hitting the road, playing their own songs and swapping a few along the way, much like Sting and Paul Simon did a couple of years back. It’s fun to imagine the juxtapositions (“Red Rain”/”Shadows in the Rain”?), what an equal trade might be (“Solsbury Hill” for “Fields of Gold”?) and what might make for an absurd duet (“Russians"? "Big Time"?). And considering the timing and locale, “Englishman in New York” should be a lock.