Vanessa Bryant Launches Mambacita Line ... Hollywood Rocks the Hell Out of it

Vanessa Bryant celebrated what would have been Gigi's 15th birthday by announcing a new clothing line in her name -- and Hollywood was quick to jump on board in support.

A score of stars posted selfies and photos over the weekend, showing them in Mambacita hoodies and other apparel being hawked by Dannijo ... the company Vanessa teamed up with for this launch.

Some of the famous faces who snapped up their gear include Eva Mendes, Kate Hudson, Jimmy Kimmel, Ciara, Lala Kent, Jennifer Garner, Kim Kardashian, Cindy Crawford, Lily Aldridge, Tia Mowry, Reese Witherspoon, Khloe Kardashian, Ellen Pompeo, Michelle Williams, Kelly Rowland ... with even more plugging the brand on their respective socials.

Oh and BTW, the sports world wasn't sleeping on this drop either -- pro athletes like Russel Wilson, Devin Booker, Kyrie Irving and the ENTIRE WARRIORS TEAM (including Steph Curry) were rocking Mambacita wear Saturday ... and Vanessa made sure to shout them all out.

Vanessa explained diving into the new venture by saying she wanted to find a way to celebrate Gigi -- who would've turned 15 on Saturday -- by capturing her spirit ... and she felt putting out an entire line in her memory was the best way to do that.

VB writes, "Gianna was kind, energetic, a leader, and had so much MAMBACITA swag.  When I thought about who would help me capture her laid back yet girly-edge, I thought of female-owned @DANNIJO. Two fun-loving sisters running a successful clothing line, they jumped on the opportunity to celebrate Gigi’s birthday with us, completely pro-bono."

She goes on to say that the details of the line -- even right down to putting #PlayGigisWay on the right arm of each hoodie (Gigi's shooting arm) -- are perfect in every way.

The best part is that 100% of the proceeds are going to the Mamba and Mambacita Sports Foundation ... which serves underprivileged athletes, especially females in sports.

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