Howard Kaylan is an American retired musician and songwriter, best known as a founding member and lead singer of the 1960s rock band The Turtles, and, along with bandmate and friend Mark Volman, a member of the 1970s rock duo Flo & Eddie, where he used the pseudonym Eddie. He also was a member of Frank Zappa's band, The Mothers of Invention.

Mark Randall Volman is an American vocalist, guitarist, and songwriter, best known as a founding member of the 1960s rock band The Turtles, and, along with his bandmate and friend Howard Kaylan, a member of the 1970s rock duo Flo & Eddie, where he used the pseudonym Flo. Volman also became a stand-out figure upon joining Frank Zappa's band, The Mothers of Invention. With Kaylan's retirement in 2017, Volman is the last original member of the Turtles still performing with the band.