On his own, Nick Jonas tries hard to grow up: Aidin Vaziri | Poor Nick Jonas: He just wants to grow up. But on Saturday night the youngest member of the Jonas Brothers was standing in a room with 2,100 people who would much prefer he stay 17 forever. Performing a sold-out concert at UC Berkeley’s Zellerbach Hall on the last date of a two-week club tour to promote “Who I Am,” the new album by his side project Nick Jonas & the Administration, the wavy-haired singer dropped every possible hint that he was ready to be taken seriously. He affected a rough-hewn blues accent. He covered the stage with ornate Persian rugs. He even brought along a backing band made up of guys three times his age. Read more.