What better way to do charity by getting these Tees from World Wildlife Fund (WWF).

To raise awareness of its campaign against global climate change, the WWF has released a line of “Hotter Than I Should Be” shirts.

WWF t-shirt signed by Scarlett Johansson.

“Global warming is the single biggest threat to our environment today,” said John Donoghue, senior vice president of World Wildlife Fund. “We’re thrilled with the overwhelming celebrity support we’ve received and are confident this auction will not only garner funds for our work but will encourage individuals to take action in their own lives to stop climate change.”

These celebrity-signed t-shirts will be available on eBay from October 3 - 12. Celebrities who have signed t-shirts:

1. Kevin Bacon
2. Candice Bergen
3. Orlando Bloom
4. Cate Blanchett
5. Gisele Bündchen
6. Cindy Crawford
7. Harrison Ford
8. Scarlett Johansson
9. Tobey Maguire
10. Rachael Ray
11. Susan Sarandon
12. Charlie Sheen
13. Martin Short
14. Oliver Stone
15. Betty White

Do your bit to support WWF’s campaign on raising awareness about causes and impacts of climate change. Just click here to go to the auctions.

If you’ll be geting the t-shirts, which celebrities signature would you bid on? Cindy Crawford?