Jan. 19, 2011 at 2:51 PM ET
"American Idol" may be kicking off season 10 tonight, but new judge Steven Tyler didn't wait to show the kids the proper way to rock the stage. Last night on "Late Night," the Aerosmith frontman performed "Walk This Way" with Jimmy Fallon and the Roots ... Run-D.M.C. style.
Take note, "Idol" hopefuls: