"This is so goddamn cool." Adam Levine has peeled a jet-black leather jacket off of his tattooed biceps and is marveling from the stage at the 16,000 fans packed into New Jersey's sold-out Izod Center. The Grammy-winning Maroon 5 frontman grins widely as the sea of twentysomething sorority types (and a few of their moms) stand before him cooing, "Aaaadam, Aaaadam."