Booboo Stewart downs a delicious milkshake as he attends the “Make a Muscle, Make a Difference” event at Millions of Milkshakes at Westfield Culver City Mall on Saturday afternoon (August 28).

The 16-year-old actor was just announced as the newest celeb ambassador for the Muscular Dystrophy Association (MDA) and is also a member of MDA’s Muscle Team. Booboo shared, “I’m excited to be making my own milkshake and helping to raise money for the MDA. I hope everyone comes out for a milkshake and to support such an amazing cause!”

Joining Booboo at the event will be Jordan Balla, 13, of Tujunga, Calif., who has spinal muscular atrophy (SMA) and served as MDA’s 2008 California State Goodwill Ambassador.

Twenty percent of all proceeds from first-day sales of the BooBoo Stewart shake will go to the Muscular Dystrophy Association.

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Lucy Hale shows off her pearly whites as she snaps a pic with JJJ reader Deyanira at the 2010 Teen Choice Awards held at the Gibson Amphitheatre earlier this month in Universal City, Calif.

Deyanira writes to us about meeting almost every celeb at the award show, “I met Booboo Stewart at the Teen Choice Awards at Universal Studios. He was really nice, and took pictures and autographs with almost everyone. Since we were on the side where the trams would arrive nobody really came over but when we screamed his name he came toward our side. I was really excited because I LOVE him and me and my cousin even came out in his video he tweeted about the Teen Choice Awards, which totally made my day.”

She continued, “Not only did I meet Booboo but I also met other celebrities like Lucy Hale, Victoria Justice, Selena Gomez (who was by far the sweetest person I’ve ever met), Nathan and Zach from Allstar Weekend, Justin Long, Jason Derulo, Lea Michele, Josh Hutcherson, Bruno Mars, Big Time Rush, Lucas Cruikshank, Adam Sevani, Jennifer Stone and Francia Raisa.”

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Booboo Stewart suits up and steps out at the 2010 WWE SummerSlam kickoff party in association with the Muscular Dystrophy Association held at the Tropicana Bar inside the Roosevelt Hotel in Hollywood on Friday night (August 13).

Joined by his sister Fivel, the 16-year-old actor also stopped by the Yo Gabba Gabba! and Alex’s Lemonade Stand concert at The Park at The Grove earlier in the day.

The Stewart Siblings, who are embarking on their own television series, were also seen out earlier in the week at the Unveiling Of The Guitartown On The Sunset Strip.

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Booboo and Fivel Stewart and Kiowa Gordon hook up with the cast of Huge as they attend the Do Something 101 Back Pack Teen Choice Awards After Party held at Universal Studios in Universal City on Sunday evening (August 8).

Inside the party, Nikki Blonsky was heard donating the shoes right off her feet to DoSomething.org immediately after taking to the stage to address the crowd. She also met up with Francia Raisa at the Waialua Soda Station to sign autographs for fans.

Zachary Levi was seen inviting volunteers into the VIP section to help him pack school supplies for the Boys & Girls Club of LA.

Booboo and Fivel were also spotted out last night (August 10) at the Nylon and Express’ Denim Issue Party held at The London Hotel in West Hollywood.

Also pictured below are Lucy Hale.

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Booboo Stewart lights up with blue carpet with his contagious smile as he arrives at the 2010 Teen Choice Awards at Gibson Amphitheatre on Sunday (August 8) in Universal City, Calif.

The 16-year-old actor and his sister Fivel shared some super cool news with Popstar! mag just before they walked the carpet: they’re getting a TV series!

Booboo dished, “It’s going to be on a brand-new network called The Hubb and it premieres 10-10-10.”

ARE YOU EXCITED for a Stewart Sibling Series?

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Booboo Stewart tries out his gaming skills on an old school Atari 2600 console as he attends Melanie Segal’s Teen Choice Retreat Presented by T.J.Maxx held at The Magic Castle in Hollywood on Wednesday afternoon (August 4).

The 16-year-old actor and his sister Fivel stopped by the MaxBack, OPI, and PNY booths at the retreat.

The MaxBack booth is a new spin on fund raising through recycling. Teens can send in their used consumer electronics — cell phones, cameras, mp3 players — and can earn points to be redeemed for cool new products from the MaxBack rewards program.

For more info, check out MaxBack.com!

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Debby Ryan leads Booboo Stewart through the crowds as they leave the 2010 VH1 Do Something! Awards held at the Hollywood Palladium on Monday evening (July 19).

The 17-year-old actress was seen hanging out with Booboo, 16, and his sister Fivel throughout most of the night. Check out the hug!

Debby tweeted before the ceremony, “The @DoSomething Awards; it might be my third year straight attending! I love honoring young people who make a difference.”

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