neko case, k.d. langd laura veirs become "case/lang/veirs". ♪ >> ♪ latin words across my heart symbols of infinitysy ♪ elements so pure atomic number. >> brown: the collaboration was the brainchild of lang, who wanted to form what she calls a... >> folk punk girl group. >> brown: the three women released an album earlier thisn summer. we spoke before a recent performance at the lincoln theater in washington d.c. >> i didn't know if it was going to work, but i thought it wouldl be interesting. and i love these artists as individual sources of great inspiration, so one day i just had the instinct to call them, to email them, and they wrote back in half an hour. >> brown: the canadian-born lang, now 54, is the senior member of the band and probably best known to the wider public, selling two million copies of her 1992 album, "ingenue". ♪ neko case, 45, has been a mainstay of indie rock and country music since the late '90s, both as a solo artist and with the band, the new pornographers. 42-year-old laura vei