Carrie Underwood and Hilary Duff and Katy Perry and Nicole Richie
Credit: Charley Gallay/WireImage; Andy Fossum/Startraksphoto; Kirkland/INF; DPA/ZUMApress

Is it just us, or is everyone in Hollywood getting engaged? Most recently Hilary Duff, Nicole Richie, Carrie Underwood, and Katy Perry have all announced their impending nuptials. (And showed off their gorgeous rocks to prove it!) While the stars plan summer soirees, try on their many previous styles—and start making bets on their hairstyles for the big day.