Pictures Celebrity Engagement Rings: Who's Wearing That Rock!? April 28, 2011 / 1:08 PM EDT / CBS News (credit: Chris Jackson/Getty Images) Kate Middleton The Royal Couple (credit: Chris Jackson/Getty Images) Who's Wearing That Rock?! (credit: David Livingston/Getty Images) Elizabeth Banks (credit: David Livingston/Getty Images) Who's Wearing That Rock?! (credit: Peter Kramer/Getty Images) Jennifer Lopez (credit: Peter Kramer/Getty Images) Who's Wearing That Rock?! (credit: Katy Winn/Getty Images) Jaime Pressly (credit: Katy Winn/Getty Images) Who's Wearing That Rock?! (credit: Frazer Harrison/Getty Images) Maggie Gyllenhaal (Photo by Evan Agostini/Getty Images) Who's Wearing That Rock?! (credit: Marsaili McGrath/Getty Images) Eva Longoria (credit: Marsaili McGrath/Getty Images) Who's Wearing That Rock?! (credit: Ethan Miller/Getty Images for MGM Mirage) Stacy "Fergie" Ferguson (credit: Ethan Miller/Getty Images for MGM Mirage) Who's Wearing That Rock?! (credit: Bryan Bedder/Getty Images) Ashlee Simpson (credit: Bryan Bedder/Getty Images) Who's Wearing That Rock?! (credit: David Livingston/Getty Images) Daisy Fuentes (credit: David Livingston/Getty Images) Who's Wearing That Rock?! (credit: Andrew H. Walker/Getty Images) Scarlett Johansson (credit: Andrew H. Walker/Getty Images) Who's Wearing That Rock?! (credit: Kristian Dowling/Getty Images) Rose McGowan Rose McGowan (credit: Kristian Dowling/Getty Images) Who's Wearing That Rock?! (credit: Gareth Cattermole/Getty Images) Mel B (credit: Gareth Cattermole/Getty Images) Who's Wearing That Rock?! (credit: Bryan Bedder/Getty Images for IMG) Natasha Bedingfield (credit: Bryan Bedder/Getty Images for IMG) Who's Wearing That Rock?! (credit: Kevin Winter/Getty Images) Megan Fox (credit: Kevin Winter/Getty Images) Who's Wearing That Rock?! (credit: Andrew H. Walker/Getty Images) Mena Suvari (credit: Andrew H. Walker/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Katy Perry Katy Perry. (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Carrie Underwood (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Ethan Miller/Getty Images) Karina Smirnoff (credit: Ethan Miller/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Emily Blunt (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Alberto E. Rodriguez/Getty Images) Amy Adams (credit: Alberto E. Rodriguez/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Jennifer Hudson (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) LeAnn Rimes (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Ethan Miller/Getty Images) Natalie Portman (credit: Ethan Miller/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Brooklyn Decker (credit: Jason Merritt/Getty Images) Who's Wearing That Rock?! (credit: Jason Merritt/Getty Images) Miranda Lambert (credit: Jason Merritt/Getty Images)