Kim Kardashian just announced her engagement to boyfriend Kris Humphries yesterday, and while her 20.5 carat engagement ring is stunning, it's not the only celebrity bauble to catch our eyes lately. From Carrie Underwood's 4-carat Ashoka-cut diamond to Hilary Duff's 14-carat, million dollar princess-cut dazzler, we've rounded up our favorite star engagement rings. Click through the gallery to see sparkling styles from Natalie Portman, Reese Witherspoon, Kate Hudson and more! And tell us, which celebrity engagement ring is your favorite?
Courtesy of People; Todd Williamson/WireImage; Jesse Grant/WireImage