In baseball terms, attending Thom Yorke’s “rehearsal” show on Friday night at the Echoplex in Los Angeles was like showing up at the stadium early to watch a slugger hit home runs in batting practice.

Before AFI took the stage Friday night, the crowd at the sold-out Epic nightclub in Minneapolis began an impromptu, fist-pumping chant: "Through our bleeding, we are one!"

Not all rock stars spend their spare time consuming narcotics and canoodling with groupies. Boring as it sounds, some actually read -- a lot. And some of what they learn even makes into their music.

It's easy to be skeptical when the term "supergroup" starts getting thrown around -- it usually connotes a battle of egos, an unwieldy split of duties, and, ultimately, music that doesn't match up to the work of the independent parts.

On a day Hayley Williams should have been so happy she could just scream, the 20-year-old Paramore singer could barely manage a yelp. Her voice hurt too much.

See our photo gallery of the show here.

Imagine if Stevie Nicks was raised on the ice planet Hoth by shamans and given unlimited access to lasers, keyboards, tribal costumes, drum and smoke machines, and elongated percussion instruments with feathers attached. Meet Fever Ray, a Swedish outfit that made their U.S. debut at Webster Hall in New York City Monday night.

What if they held a sunrise concert and everybody showed up except the sun?

The live solo debut from Interpol frontman Paul Banks -- nom de tune Julian Plenti -- Friday night at New York City's Guggenheim Museum was a highfalutin mind-bender: Where else can 200 dapper folks stand beneath a dizzying Frank Lloyd Wright-designed rotunda, hear one of rock's chicest stars unleash brooding new tunes, and examine the brushstrokes of paintings from Vasily Kandinsky's

Friday night the KISS army invaded Detroit Rock City. Suburban families, pony-tailed bikers, cleavage-flaunting cougars, and packs of 40-year-old fathers bulging in their aged acid-washed jeans all painted their faces black and white for the opening date of KISS' U.S. tour at the old-school Cobo Hall. Their mission: To rock. HARD.

Mission accomplished.

Ryan Adams is willing to go the distance for charity. In fact, the rocker-cum-author-cum-painter will even alter his artwork especially for YOU -- as along as the price is right.