New music: in stores and online
Avril Lavigne (pictured) brings in her Sum 41 ex-husband for production help on her newest release, while R.E.M. hit the astonishing 15th album mark and Lupe Fiasco's long-delayed third album finally sees the light of day. We've got reviews of this week's top releases, plus quick takes on the newest releases from the cast of "Glee," Sara Evans, Wye Oak, Alexi Murdoch and more, inside the gallery.—Jessica Jardine and Andy Hermann, Metromix
Avril Lavigne, 'Goodbye Lullaby'
R.E.M., 'Collapse Into Now'
Lupe Fiasco, 'Lasers'
Which of this week's releases are on your must-hear list? Tell us in the comments section.