Marg Helgenberger of “CSI” and the midseason show “Intelligence,” whose mother battled breast cancer, has teamed up with Stand Up to Cancer and the Safeway Foundation for a PSA to raise awareness and funds for breast cancer research. Launching for Breast Cancer Awareness Month October 1, the spot, optimistically titled “Together we’re creating a brighter tomorrow,” encourages the purchase of a limited edition reusable Safeway shopping bag for $2.99, $2 of which goes to the breast cancer cause.

“I am proud and honored to be a part of this campaign again and work closely with two organizations dedicated to eradicating this disease,” says Helgenberger. “I stand up for my mother and stand strong alongside all the women and families who have been affected by this disease.”

Actress Tia Mowry, who stars in the new NickMom sitcom “Instant Mom,” has teamed up with FluMist to raise awareness for flu prevention. Her PSA “Insist on the Mist” depicts her as a busy working mom who puts her family’s health first. “My hope is that our video will reinforce the value of flu vaccination and encourage families to speak with their doctors about the vaccine options available this flu season,” says Mowry. The inhaled vaccine is designed for people 2-49 but is contraindicated for pregnant or nursing women and those with certain medical conditions. More information can be found at

Actress Phoebe Tonkin brings a global perspective to her philanthropic efforts. “My parents are travel agents and from a young age we traveled a lot and were always aware of what was going on in different countries, especially third world countries,” says the Australian actress, whose “Vampire Diaries” spinoff “The Originals” premieres on the CW October 3. “When I was 18, my friends were going off to college and I decided to go to Cambodia for six weeks as a volunteer and I fell in love with the place and the people, the children. I struck up a friendship with a beautiful woman called Tara who works wit the Cambodian Children’s Trust and I’ve been quietly supporting them ever since. Now with social media, it’s such a great tool to bring awareness to that charity.”

Tonkin, also a green-living proponent, launched a Website with her friend, actress Teresa Palmer, called “We give health tips, tips on eating healthy, recycling, gardening--everything we’re interested in talking about.

World Day for Farmed Animals is October 2, and celebrities including Mayim Bialik, Russell Simmons, Leona Lewis, Emily Deschanel, Kevin Nealon, Shannon Elizabeth, Fred Willard, and Joan Jett, are lending their support to an anti-cruelty campaign spearheaded by Farm Sanctuary, the largest farm animal rescue and protection organization in the U.S. It operates shelters in New York and California, caring for nearly 1000 rescued animals, and works to change laws to decrease animal abuse. The fundraising and awareness campaign asks “What Did You Do?” when you heard about mistreatment of animals on factory farms, and prompts people to learn more by visiting and take action by writing a letter to Congress, sharing a video, or donating to the cause.

Celebrities take to YouTube to promote their charitable causes
From cancer research to animal rights, actors become activists in new videos.