For the first time, SXSW began hosting official music showcases on Tuesday evening this year, including a set by Mister Heavenly with Michael Cera on bass (plus����Man Man's Honus Honus and Islands' Nick Diamonds sharing vocal duties, and����Modest Mouse's Joe Plummer on drums). Other Tuesday highlights included the Civil Wars and Minneapolis-based Dearling Physique. PHOTOS BY STACY SCHWARTZ on March 15, 2011.