 The Vamps toured as an all-female 4-piece with various personnel through to March 1971 when Margaret Britt's husband Jon Kirk joined the band and it was renamed Jon and the Vamps, or Jon and the Australian Vamps.They played in Australia during a brief visit in April 1972 and upon returning to the United States in June the band was expanded to an 8-piece.They performed around the country in 38 States, including Hawaii, almost continuously until February 1975, with Margaret Britt the only non-American member.