The Hills stars have a festive Cinco de Mayo in West Hollywood. Plus: Blake & Penn, Katie and more

JUST ENGAGED!

Newly engaged to Ryan Reynolds, a glowing Scarlett Johansson shows off a sparkling diamond ring while posing – in an ivory Dolce & Gabbana dress – with designers Domenico Dolce and Stefano Gabbana at the Metropolitan Museum of Art's Costume Institute Gala in New York City.