Peter Stampfel is a singer from Wisconsin. He sang both "Fingertips (Banjo)" and "Fingertips (Whispered)" on Apollo 18. Stampfel is a founding member of The Holy Modal Rounders, a folk duo formerly signed to Elektra. In 1994, he released a CD on Flansburgh's Hello CD Of The Month Club. In 2009, Stampfel opened for a few TMBG shows.
Stampfel also collects bottle caps, with a collection well into the thousands. He has lent a few to John Flansburgh, who keeps them on his desk.