Kelly Bensimon
The former Real Housewives star cleans out her closet with high-end online designer consignment website The Real Real which gives proceeds to The Food Bank NYC.
Colin Firth
The beloved Oscar winner put the spotlight on the plight of the Awa tribe in the Amazon and urged people to get involved to help.
Rosario Dawson
The actress, who is set to play labor leader and civil rights activist Dolores Huera in an upcoming Cesar Chavez biopic, speaks at the University of Southern California during the Voto Latino Power summit designed to educate, engage and empower young Latino leaders from around the country.
Thandie Newton, Jeremy Gilley & Jude Law
The actor and actress join the founder of Peace One Day at Grosvenor House in London to help launch the charity's "Reducing Dometic Violence" initiative.
Adrian Grenier
The Entourage star attends Oceana's Inaugural SeaBlue Event at the W Fort Lauderdale. "I'm playing w/@thehoneybros tonight @WHotelFortLaud for @Oceana event," he tweeted. "Sold Out! Good for the tunes, great for protecting sharks."
Julianne Moore, America Ferrera & Gabrielle Union
The trio lend their support to Planned Parenthood Action Fund by participating in a panel talk on women's health issues in New York City. The organization provides key services for sexual and reproductive health care, and spearheads relevant educational programs.
Isla Fisher
While at the Sundance Film Festival in Park City, the actress shows her support for the Bertolli Meal Soup Chalet's Ladles of Love program benefiting Feeding America.
Holly Robinson Peete
The actress attended AEG's Season of Giving On-Ice event at L.A. Live to present iPads to families as a part of her HollyRod Foundation's "Give the Gift of Voice" campaign. The campaign provides iPads with specially designed communication "apps" to help give a voice to individuals with autism.
Dot Marie Jones & Jayma Mays
The Glee stars present a $10,000 check to Culver City Middle School in L.A. The school is one of 73 winners of the "Glee Give a Note" competition which helps save at-risk music and arts programs.
Blake Lively
The Gossip Girl gal introduces her own S'mores cupcake creation at Sprinkles in NYC. Proceeds from the sale of the sweet treat will benefit Oxfam's Somalia Disaster Fund.
Nicole Kidman
The Oscar winner is teaming up with Rue La La, a members-only online shopping destination, to curate a charitable boutique for the site on Dec. 15 called "Doing a Little Good," with 100 percent of the net profits benefitting the star's charity of choice, Stanford Women's Cancer Center.
Alicia Keys
At her Keep a Child Alive Black Ball, the singer raised a whopping $3 million for children in Africa who've been affected by AIDS/HIV.
Alyssa Milano
The new mom takes a break from diaper duty to support Sea Shepherd Conservation Society's Stand Up for the Ocean, a benefit to launch the Antarctic Whale Defense Campaign.
James & Kimberly Van Der Beek
The couple announced they're expecting baby No. 2 while supporting the launch of the Great Giggle Giveback benefiting Baby Buggy, which provides essential gear, clothing and educational services to families in need.
Natalie Maines
The Dixie Chicks frontwoman sings her heart out in Austin during a concert that raised more than $500,000 for victims of the wildfires that recently plagued the state of Texas. Country legends Willie Nelson and George Strait were among the other musicians who performed.
Dierks Bentley
The country music star collected over $144,000 for Chicago's Children's Memorial Hospital by way of his annual Miles & Music for Kids fundraiser. The event, now in its fifth year, featured a motorcycle ride and outdoor block party in Nashville.
Angelina Jolie
Standing tall at a UNHRC ceremony, the A-list activist proudly accepts an award for performing a decade of refugee work as a Goodwill Ambassador. During her acceptance speech, the actress took a moment to remind the audience of the ongoing refugee problem in Somalia.
Jennifer Aniston
The actress visits the Inova Alexandria Hospital's Breast Care Center along with Second Lady Jill Biden (third from left) as part of October's Breast Cancer Awareness month. Jen's also drawing attention to the cause through the upcoming Lifetime short that she directed, Five.
Edward Norton
The Fight Club actor takes a swig of something nasty while filming a PSA for Crowdrise's Donate to Drink campaign, a $2 million challenge that helps people around the world gain access to clean drinking water.
Fergie
Strike a pose! The Black Eyed Peas take over Central Park's Great Lawn during Chase's Concert 4 NYC benefiting the Robin Hood Foundation.
Elisabeth Moss & Christina Hendricks
The marvelous Mad Men ladies join other castmates, including Jon Hamm, at a charity brunch on behalf of the Rape Treatment Center in Beverly Hills.
Robert De Niro
The former Raging Bull makes like a nice guy at a gala event with Sean Penn, Leonardo DiCaprio, Ann Curry, George Clooney, Richard Gere, Nicole Kidman and Susan Sarandon to support the new universal logo for human rights.
Josh Duhamel
The actor, a native of Minot, North Dakota, is the honorary chairman for the Minot Area Recovery Fund, which is hosting a benefit concert (Sept.3) by the Black Eyed Peas to assist flood victims in the area.
Tom Felton
Sporting his signature Euro style, Harry Potter star Tom Felton practices his golf swing with fellow celebs at the 4th Annual Celebrity Skins Classic at the Trump National Golf Course in Palos Verdes, CA to benefit the Ryan Sheckler Foundation.