Sonic Youth frontman Thurston Moore has hit out at Avril Lavigne and John Mayer, insisting 70 year olds rock harder than they do. The rocker recently collaborated with Yoko Ono, and claims she is edgier than most modern artists. He tells Spin magazine, "I am playing with Yoko Ono, and she's well past 70 and she rocks. Neil Young rocks. It's certainly not John Mayer or Avril Lavigne. Those people don't rock. If that's the young generation in the culture, then (forget) it. In the underground, the old guys are cool. I like the fact that the older we get the more we can rock."