Pixies debuted a new song, “Um Chagga Lagga,” at New York’s Beacon Theatre on 5/26, and today, Rolling Stone posted two videos of the band playing a live session, one of which was a rendition of the track. Though the song still hasn’t been recorded, it’s safe to say that it’s been a work-in-progress for a while, since we already heard Black Francis demo it last year. Watch a live performance version and a more cleaned-up studio video of Pixies playing “Um Chagga Lagga” below.