Hailing from Wales, Los Campesinos! play wild indie-pop that’s clever, catchy, and overflowing with fiery, jarring punk-infused moments. Though the seven-piece has gone through a number of personnel changes over the years, the band’s nurtured a tight, sunny-meets-rowdy sound — inspiring everything from joyous head-bobbing to adrenalized raised fists. Underneath the energetic, sweet melodies are tales of heartache. Here that vulnerability especially shows, as they perform stripped-down versions of songs off their latest album, Hello Sadness.