The newlyweds take extra precautions while vacationing in Cabo San Lucas, Mexico. Plus: Mary-Kate Olsen, Heidi Klum and more

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FASHION FORWARD

After a casual day out the day before, Mary-Kate Olsen perks up in purple to fete designer pal Matthew Williamson's new collection for H&M during a starry party Tuesday on a yacht docked outside New York's South Street Seaport.