SNSD's YoonA is endorsing Innisfree's 'Green Christmas' campaign, a charity effort aiming to help the 'Save the Children' organization. YoonA's Innisfree CF was unveiled today, which tackled a "flashmob" concept in a store. Customers were caught unawares when YoonA stepped out of a giant gift box, singing "We Wish You a Merry Christmas" along with staff and other guests. In this 'Green Christmas' campaign, Innisfree will donate 500 won from every 'Green Christmas' product sold, as well as a pair of socks. As Yoona states at the end of the commercial, "Your special Christmas will be someone's warm Christmas, Green Christmas!" Check out the full commercial below: