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Solange Knowles

And last but not least we have Beyonce's baby sis, Solange Knowles, who channeled Old Hollywood by donning this glamorous Rubin Singer gown and gold accents at the amfAR soiree in Milan, Italy. Bellisima! (9/22/2012)

See Solange's "I Decided" music video

2 Hot 2 Handle

This week's best-dressed crew includes Penelope Cruz, Amanda Seyfried, and Jessica Alba! -- By Matt Whitfield, Yahoo! Staff