Andy Roddick and a Muppett

I'm not sure exactly what is going on in this picture. First, we have Andy with a sh*t eating grin on his face, like he just jizzed in his pants. Second, what the hell is a muppett doing there?? What does a muppett have to do with Andy Roddick or Macy's or Lacoste?? And finally, well I'm not even going to start with the kid on the left.