6. Holly Madison
Rainbow Aurora's mommy got engaged to beau Pasquale Rotella in Las Vegas at the top of a Ferris Wheel during the Electric Daisy Carnival. The bling-tastic 18-carat ring, which was designed by Rotella and celebrity jewelers Layna and Alan Friedman, features a cushion-cut yellow diamond surrounded by pink and yellow diamond flower. There's also a hidden owl engraved on the rose gold because the couple loves owls so much.
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