If you are in need of any more proof that Hanson was never a "boy band," think about this: Where are all those boy bands? Cut-out bin? Unemployment line? Rehab? These three Oklahoma brothers, meanwhile, have not only grown into strong singer/songwriters, they've got their business heads together, having released their latest disc, the acoustic-heavy Underneath, on their own, because they were tired of having their major label push 'em around. They didn't just grow up, they grew guts. 7 p.m. Tuesday. Nokia Theatre at Grand Prairie. $21-$35. Metro (972) 647-5700.