Serena Williams dons her best and newest Berlei bra to let her hair down and dance in the latest ad for the Australian-based lingerie company. The world No. 2 performances an epic, free flowing routine to "Dancing with Myself" for the "Do it for Yourself" campaign.

"Sometimes we are all so serious and we forget to have fun—and I know that’s me a lot of the time, but it’s so important to have passions in your life that are just for you," Williams writes. "I’m so disciplined every day with my training, but when I dance it’s about letting myself go. What do you do for you?"

If anyone is going to be able to dance like no one is watching in just a bra and leggings, it's a 22-time Grand Slam champion.