Poised somewhere between the Andrews Sisters and Nouvelle Vague, the Puppini Sisters modernize vocal harmony pop while keeping its so traditional, it's hip appeal. On their debut Betcha Bottom Dollar, the Sisters' style is their substance; it's not a coincidence that the founding Puppini, Marcella, worked for fashion icon Vivienne Westwood before forming the group. Fortunately, the trio's style ? vintage '40s outfits, cheeky covers of new wave and post-punk classics and all ? manages to stay on the likeable, not grating, side of kitsch. Taken individually, the trio's voices aren't spectacular, but they blend together nicely enough to create a convincing homage to the heyday of vocal harmony pop in the '30s and '40s. A very pleasant Mr. Sandman, a pretty, languid Java Jive and Sway are among the best vocal pop standards on Betcha Bottom Dollar, but interestingly enough, the Puppini Sisters often sound less campy on the songs they remake than on the classics.