Roger Federer stuns in cobra tux at the Met Gala, Caroline Wozniacki makes it "Instagram official," and more in this week's must see social posts ⇩

Federer stuns in cobra-adorned tux at Met Gala, Serena throws it back with Venus, and Wozniacki makes it Instagram official with David Lee. Here are some of the must see social posts from the week of April 29, 2017.