Applegate is a fan favorite outside The Late Show with David Letterman studio in New York City. Plus: Harrison & Calista, Nicole & Joel, Mary-Kate Olsen and more

WHAT A RACKET!

That's not a tennis court! Venus Williams holds up traffic – and her racket – while filming a commercial Monday with fellow tennis star Andy Murray (not pictured) atop of cars in Miami Beach. The pros are in the Sunshine State to compete in the Sony Ericsson Open, which begins Wednesday.