HOTTT!

The 31st-ranked Mattek-Sands turned heads at Thursday night's Wimbledon player's party in a dress designed by Lady Gaga's designer, Alex Noble

"I had a blast working with him," she said. "It's the funky dress I wanted."

The hat was one of her favorite flourishes. "When you're in England you have to have some cool headwear," she said.

YES COOL INDEED! I want one!

.