17 Dazzling Star Sparklers

These gems have five Cs: cut, color, clarity, carats and celebrity! See the big bling worn by Hollywood's most engaging women

KRISTIN CAVALLARI

It's so nice, she's worn it twice! The reality star sported this square-cut stunner from now-husband Jay Cutler when the two were engaged in April 2011. Though they briefly separated that summer, the couple gave their relationship another shot that November – and Cavallari's been wearing the same ring ever since.