Nirvana, 'Live at Reading' (Universal)

Ultimate rock gig from ultimate outsider-insiders.

Nirvana's headlining gig at the 1992 Reading Festival looms infamously large because of (a) that amazingly creepy photo of Kurt getting wheeled onto the stage looking like Norman Bates' mother, and (b) the show was a mind-blower -- sloppy indie rock as stadium-filling psychedelic punk.

The King Khan & BBQ Show, 'Invisible Girl' (In the Red)

Trash-rock hullabaloo with a slurp and a burp.

Onstage, King Khan has been known to holster the microphone between his ass cheeks. But even knowing that still doesn't prepare you for the anatomical, scatological, and carnal onslaught of "Tastebuds," the third track off his second album with Mark "BBQ" Sultan.

Gift of Gab, 'Escape 2 Mars' (Cornerstone Ras)

Blackalicious MC stays begrudgingly grounded.

Five years after his solo debut, 4th Dimensional Rocketships Going Up, Gift of Gab returns to space…sort of. The Bay Area MC imagines playing intergalactic hooky, but admits on "Lightyears" that it's "just a dream, just a surface." Meanwhile, Earth is plagued with "Electric Waterfalls," and he despairingly observes "Richman, Poorman" games.

Jack Johnson, 'En Concert' (Brushfire)

In the European Union, they call him Jacques.

Think you know all there is to know about Jack Johnson?

Florence and the Machine, 'Lungs' (Universal/Island)

Flame-haired flamethrower sets alt-rock boys ablaze.

Calling all crazy ex-girlfriends: If you’re gonna keep up with Florence Welch, you might need stronger meds.