"Once reluctant to cede control, brands and retailers from low to high are embracing social media and using it to boost sales and brand awareness. Having a presence on the top five social sites — Twitter, Facebook, MySpace, Flickr and YouTube — is de rigueur. The top luxury fashion brands on Facebook in terms of fans are Gucci, Chanel, Dolce & Gabbana, Ralph Lauren, Coach and Prada (although the Prada page is an unofficial one), according to New York University professor of marketing and Red Envelope founder Scott Galloway. Luxury fashion brands with the most Twitter followers are Vuitton, Tory Burch, Yves Saint Laurent and Christian Dior."
read more: Everyone's Doing It: Brands Take on Social Media - Media News - WWD.com.