Serena Williams Strips Down to Lingerie and Dances Like No One's Watching in New Ad

Hump day will never be the same.

Hump day will never be the same.

On Wednesday, Berlei released a new sexy ad featuring Serena Williams dancing by herself in lingerie to a cover of Billy Idol's "Dancing With Myself."

The ad for the Australian intimates brand was shared along with the hashtag #DoItYourself, which holds special meaning for the newly engaged tennis legend.

WATCH: Serena Williams Hilariously Trolls Fans Who Want to See Her Engagement Ring

"To me, 'Do It for Yourself' is really standing up for yourself and what you believe in and just doing it," Williams, 35, said in a behind-the-scenes video. "I always say there's going to be so many people who are not going to believe in you and try to hold you back from your dreams, but I believe that it's really so important to do everything in your life for you. And I think ultimately you get the best results that way."

The 60-second commercial shows that Williams' talents clearly extend beyond the tennis court, and she opened up about her passion for dance in an Instagram post.

"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," she wrote. "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?"

WATCH: Serena Williams Gives Fans the First Look at Her Engagement Ring From Alexis Ohanian

Last week, Williams finally gave fans a first look at her massive engagement ring from Reddit co-founder Alexis Ohanian. The reveal came after hilariously trolling fans with an epic taco ring she joked was the sparkler Ohanian used to propose.