Big celebs gather to same the planet before it’s “going, going, gone,” stars rally for survivors in Japan and an actor takes a walk for leukemia and lymphoma.

The Planet is Going, Going, Gone

The Bid to Save the Earth auction launched this week with some pretty big celebrity players stepping up to the plate for a good cause — the planet. From now through April 7 you can go online and take a chance at winning a golf game with Bill Clinton or a flight with Harrison Ford. And a star-studded live event will take place on March 29 in New York City’s Rockefeller Center. The proceeds from all of it will go to four environmental organizations — Central Park Conservancy, Conservation International, the Natural Resources Defense Council and Oceana.

Stars have donated over 200 lots to the auction bringing the four charities together to save the planet or as the tagline reads, “Before our world is going, going, gone.”

Last year the auction raised $2.4 million, which should be an easy task considering the price tags. For example the bid for the golf outing with Bill Clinton is currently at $16,000 but the estimated value is $100,000. You can get a once in a lifetime Chanel Experience complete with airfare and five nights at the Ritz in Paris, as well as front row seats at the Chanel Couture Show, a meet and greet with Karl Lagerfeld and a private tour of the Coco Chanel apartment. Sound like it’s worth $22,000 to you?

Make some pop fan in your life happy by bidding on a trip to Miami to see Lady Gaga (current bid $2,500) or thrill a reality TV fan with a chance to meet Michael Kors and Heidi Klum with the “Project Runway” package (current bid $2,250).

Also up for grabs — dinner with Chevy Chase (current bid $1,100), a walk-on role on “Bored to Death” (current bid $1,000) or be your teen daughter’s best friend by snagging tickets to the “American Idol” finale (current bid $1,500).

To see more check out the auction at www.abidtosavetheearth.org or if your pockets aren’t that deep, you still donate to the cause by texting GOGREEN to 20222. Your $10 donation will go directly to Bid to Save the Earth.

Stars Step Up for Japanese Earthquake and Tsunami Relief

So far George Clooney and Sean Penn haven’t stepped up to launch a full-scale charity event for the Japanese earthquake and tsunami victims. We can only hope that plans are underway and we’ll be hearing about it soon. In the meantime a few celebs have stepped up to lend more than just condolences on Twitter.

Lady Gaga has designed a rubber wristband in support of the victims. The white bracelet has red text that reads, “We pray for Japan” in English and Japanese, and also features her monsters claw. Each band costs $5 and all of the proceeds will go to relief efforts.

Charlie Sheen has proven that even someone with tiger’s blood can have a heart. The Vatican Assassin is donating $1 from each ticket sold to the Red Cross during his “My Violent Torpedo of Truth/Defeat Is Not an Option” tour. The good news is that Sheen’s shows in Chicago and Detroit sold out at record-breaking speeds (it took just 18 minutes). That could be a good chunk of change for relief efforts – the former “Two and a Half Men” star just expanded his tour to New York City and over 20 more destinations.

Singer Jack Johnson was actually on tour in Japan when the earthquake and tsunami hit. Although he performed in Osaka that night, he’s canceled the rest of his shows there, including one that was scheduled in Sendai, which was one of the worst hit areas in the tragedy. He’s pledged $50,000 to Global Giving’s Japan Earthquake and Tsunami Relief Fund.

Never one to turn her back on a good cause, Oscar-winning actress Sandra Bullock is giving, too. The star quietly donated $1 million to the American Red Cross yesterday, just as she had done to assist Haitian earthquake victims in 2010.

Dexter Walks for the Leukemia & Lymphoma Society

This week the Emmy-nominated star of “Dexter,” Michael C. Hall, was named the Ambassador for the Leukemia & Lymphoma Society’s 2011 Light The Night Walks. Hall, who successfully battled Hodgkin Lymphoma himself in 2010, will be the spokesperson for the annual event. In addition he will be shooting a PSA in the near future with filmmaker Jesse Dylan.

LLS’s Light The Night Walk, a leisurely moonlight stroll that takes place in 200 cities across the country each fall, raises money for research and support for people battling cancer. Hall’s PSA will encourage people to take part either by signing up to walk, making a donation or volunteering to help at the event. The walk is one of the largest cancer fundraisers to take place nationwide with an anticipated 250,000 participants.

Hall said, “The Leukemia & Lymphoma Society pours a tremendous amount of money directly into cutting-edge cancer research – research that I’ve certainly benefited from. It’s an organization that you can be confident is at the forefront of moving things forward.”

For more details visit the LLS website.