It’s only rock and roll… but I like it. Mick Jagger was both host and musical guest on Saturday Night Live this past weekend and, for his first number, he performed the Rolling Stones classic “The Last Time” while backed by Arcade Fire. It isn’t everyday you see the lead singer of the Stones shimmying with an accordion player (in this case, Arcade Fire’s Régine Chassagne), so savor this image while you can.