M&M's -- No!

"Numbers by painting," Forbes, Jan 14 2007:

What if you could auction off a logo at Christie's or Sotheby's (nyse: BID - news - people ) to determine the notoriously tough-to-measure market value of a brand?One prism through which to measure the perceived value of global brands is the contemporary art world, and in particular the sale prices of the works of Wang Guangyi, one of the leading lights of the post-1989 Political Pop Art movement in China ... Wang is the Andy Warhol of the Chinese art scene--at once criticizing commercialism and profiting by including famous brand names in his works.

The rest of the article can be found here.

My favourite Wang (only because I prefer Reese's):

M&M's ("The Great Criticism" series: M&M'S)
Oil on canvas, 1993, Sale price: $180,000 Estimate: $150,000-$180,000, Sotheby's New YorkSale: Contemporary Asian Art, Sept. 20, 2006