The INSIDER Summary:

• Kate Hudson revealed that her best workout hack came from shaving her head.
• She admits that it "cuts down on the time spent post-sweat."
• The star also revealed that her brother, Oliver Hudson, is her support system for when she may be feeling insecure.

Kate Hudson knows a thing or two about working out: She even has her own athleisure empire in Fabletics. But as Cosmopolitan‘s October cover girl, who is featured in a gorgeous ’70s-inspired bodysuit, revealed to the mag, her best workout hack came from a rather unexpected source.

As the 38-year-old dished, it’s actually her newly shaved head that helps her sweat it out — literally. “Cuts down on time spent post-sweat,” she admits.

While she didn’t get into the nitty gritty deets about how she feels being part of Hollywood’s buzz-cut club, she did reveal the one person who helps her out should she ever be feeling insecure. That favorite advice giver is none other than brother Oliver Hudson, who the "Deepwater Horizon" actress says she regularly calls for some laughter therapy and words of encouragement. The business mogul shared his best words of advice, saying, “‘Nobody cares! ‘There’s about seven plus billion people in the world who don’t give a sh-t.” Preach!

It’s that type of carefree attitude that led to some of her happiest moments in the last year. “Working with Sia on our special project ("Sisters") and knowing that not matter what, I will always have a lifelong friend in her,” Hudson said. What a beautiful person.”

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