The Puppini Sisters - From the first strains of the opening track Sisters, it's clear that Betcha Bottom Dollar is not a typical debut album. But then the Puppini Sisters are not a typical pop act, at least not in the 21st Century. Their close, three-part harmonies are reminiscent of the vocal groups of the 1930s and 1940s, and particularly the Andrews Sisters. But rather than sounding like an anachronism, the Puppini Sisters merely demonstrate the timelessness of some of these songs.