MANSFIELD -- Before an audience of screaming fans, the Backstreet Boys revealed Sunday that they could survive the five-year gap between ''Black & Blue," their last album of all-new material, and the new ''Never Gone." The quintet, once the kings of the boy-band scene, performed a two-hour set so meticulously arranged that it took a series of severe thunderstorm warnings -- culminating in an unscheduled 15-minute break -- to add some spontaneity to the Tweeter Center proceedings.
Otherwise, everything went by at a steady clip, with video montages, pyro and laser displays, and Nick Carter playing guitar to no discernible effect during ''Climbing the Walls" and ''Just Want You to Know." Kevin Richardson's piano-playing during ''Weird World" and ''Incomplete" was more integral, but the group mostly performed its busy if not especially accomplished choreography, played to the fans, and passed lead vocals around like a football. The Boys were at their best when they harmonized on ''The One," ''Show Me the Meaning of Being Lonely," and ''Siberia," which featured an insistent ticking-clock riff as artificial snow came down.