<P>From pricey perfume to pre-packaged food - having a famous face attached to a product can give companies a big boost.</P>

<P>And the latest trend in celebrity endorsements focuses on working-out and gyms.</P>

<P>Fans of the Bey-hive can now look like the queen. Beyonce's new fashion line, Ivy Park, is for sale.</P>

<P>It's part of a fitness-meets-fashion trend called Athleisure.</P>

<P>Kate Hudson, Brooke Burke, Carrie Underwood and many other celebs have also launched avricewear lines recently.</P>

<P>The point is to make stylish, flattering clothing that can go from the gym to the coffee shop and, in some cases, the office.</P>

<P>The multi-purpose fashion helps widen the base of people buying these brands - meaning more money for apparel companies.</P>

<P>The fitness fashion market has been hotter than ever</P>

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<P>According to USA Today, last fiscal year Nike's women's business grey 20 percent.</P>

<P>That's more than twice the rate of growth on the men's side in the same period.</P>

<P>And it's not just Nike.</P>

<P>According to research from the NPD Group, from June 2014 to June 2015 women's fitness apparel outpaced the overall fitness apparel business - growing 9 percent as compared to a little less than 7 percent in the entire industry.</P>

<P>When you are talking about a multi-billion dollar store, those percentages add up, which perhaps means more celebs are wanting to cash in.</P>

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