To understand the Degree of Difficulty inherent in the Nova Singers' season-opening concert, first imagine singing a particular vocal line - be it soprano, alto, tenor, or bass - against the three other vocal lines, and doing it a cappella, to boot.

Then imagine singing your part while those four parts turn into eight.

Then imagine singing your part while those eight parts turn into 12.

And then, imagine staying on your part with 81 people around you attempting the exact same thing.

Two corporate brands are looking to snuggle up with taste-making young consumers with new CDs. Toyota's Scion line has always been serious about its factory-installed sound systems, and now its audio/visual department has teamed with five hip record labels - Ninja Tune, Vice, Light in the Attic, Greensleeves, and Strictly Rhythm Records - for a series of pumping remix discs. Letting each label's stable of artists cut loose on a label-mate's work, highlights include knob-twisting from Modeselektor, Max Glazer & Federation of Sound, and Holy Ghost.

On "Puttin' People on the Moon," the Driver-By Truckers' Patterson Hood sings a litany of tragedies personal and regional: "Mary Alice got cancer just like everybody here / Seems everyone I know is gettin' cancer every year / And we can't afford no insurance, I been 10 years unemployed / So she didn't get no chemo so our lives was destroyed / And nothin' ever changes, the cemetery gets more full / And now over there in Huntsville, even NASA's shut down too."

It's a woman's world in two upcoming CD tribute projects that benefit breast-cancer support and awareness. Later this month New Jersey's Face Down Records will release About a Girl, collecting cover contributions from Philadelphia-area artists taking aim at songs with a woman's name in the title. AC/DC's "Whole Lotta Rosie" is found within, covered by Beretta 76, as is the Jukebox Zeroes' spin on The Sonics' "Cinderella" and the Creeping Weeds' hand at Arthur Alexander's "Anna." With proceeds benefiting the Pennsylvania Breast Cancer Coalition, the disc also includes covers of Elvis Costello's "Allison," Weezer's "Suzanne," The Kinks' "Victoria," and the AM-radio nugget by The Looking Glass, "Brandy (You're a Fine Girl)."