This week was all about glitz and glamour. And the winners are...

Gwen Stefani in L.A.M.B. at the 2011 amfAR Cinema Against AIDS Gala. The singer and mom of two looked like Hollywood Barbie in this gold-belted fishtail gown featuring a lace collar and allover shimmer, which proved my favorite gown of the week.   

Jane Fonda in Roberto Cavalli at the 2011 amfAR Cinema Against AIDS Gala. The actress and fitness buff proved she's still got it (at age 73) in this gorgeous, sequin-leopard-spotted gown, which she accented with emerald drop earrings.  

Penelope Cruz in Armani Prive at the “Pirates Of The Caribbean: On Stranger Tides” premiere in Germany. Penelope looked red-hot (even for her) in this fiery, taffeta gown.

Kirsten Dunst in Chanel Couture at the 2011 amfAR Cinema Against AIDS Gala. While this romantic gown definitely had an old-fashioned feel to it, the multi-patterned detailing on the sheer overlay came off as fresh and modern. I also love how Kirsten sharpened her otherwise soft look with a bold lip.

Bar Refaeli in Roberto Cavalli at the 2011 Cannes Film Festival. The newly single model showcased her smokin' bod in this curve-hugging creation, which boasted cutouts and a sequin lined collar for extra sex appeal.

Photos (left to right): George Pimentel/FilmMagic; Ian Gavan/Getty Images; Hannes Magerstaedt/Getty Images; Mike Marsland/WireImage; George Pimentel/FilmMagic