06/09/2008 at 01:00 AM EDT
breathes more life into "No Air," her duet with Chris Brown, with a digital-only acoustic version of the Top 5 hit. At amazon.com.
BECK concocts an addictive potion of alt-rock and Doors-esque psychedelia on "Chemtrails," from his 10th studio CD, due this summer. At beck.com.
MAROON 5 team with Rihanna
for a funky revamp of "If I Never See Your Face Again," from the upcoming reissue of It Won't Be Soon Before Long
. At iTunes.com.