Thanks to hockey, Bush never went away. "Machinehead" and "Everything Zen" are staples in NHL arena. Now that those bubblegrunge tunes have hit the 20th anniversary mark, its a convenient time to reassess the Nirvana knockoffs. In hindsight, the Brits are rather harmless. There's a new record, and Gavin Rossdale is assisting his celeb wife on The Voice, but the band's two decade mark probably means this gig leans nostalgic. Will Steve Albini show up to jam on some Razorblade Suitcase rawk? Don't bet on it.