no, of course not!white nail polish is SO hot right now, (and good choice with the black/plum - its really classy and fashionable right now too) - no, it doesn't look tacky - if you apply it right.white nail polish is pretty versatile - so like, you could wear it with pretty much anything.it depends on your style, but a pretty summer type dress with white nails would look gorgeous, as would heels, jeans and a tank.so its really up to you
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