“Holly Brook Hafermann is a lifer: She made folk LPs with Mom (see Generations), went solo in a Sarah McLachlan vein, and co-wrote Eminem and Rihanna's "Love the Way You Lie." Skylar Grey is her bad-girl alter ego, and you've gotta love a pop star who titles a song about unplanned pregnancy "Shit, Man!" But even a goofy Eminem cameo (the "Allen Iverson of safe sex") can't save "C'mon Let Me Ride" f”