The Exchange performed as the opening act for the vocal group founded in 1993 in what city?
The Exchange (band):  The band was a finalist on Season 5 of NBC's musical reality television show "The Sing-Off" and also performed as the Backstreet Boys' opening act during the 2014 “In a World Like This” European tour. Backstreet Boys: The Backstreet Boys (often abbreviated as BSB) are an American vocal group, formed in Orlando, Florida in 1993.
i don't know