In an interview track on this hour-long career retrospective, Karen O says that she and guitarist Nick Zinner first got together playing "really beautiful acoustic songs, some soul stuff." They still are. The five acoustic takes on old songs here crank up the poignancy that touches even the band's scuzziest punk moments. A string trio on "Maps" and "Runaway," though lovely, flirts with heart-yanking overkill, but "Dull Life" stays hard, a pogo-ing rocker redone as a gypsy-folk whirlwind. The underdog killer: "Our Time," a soft obscurity from the YYY's torrid first EP in which Karen scrawls "It's the year to be hated/So glad that we made it" in our cosmic yearbook.