Watch Bruce Springsteen's Surprise Appearance at In-Law's Rock Show

One day after commanding the stage with U2 at Madison Square Garden, Bruce Springsteen made a lower-key guest appearance on Saturday: assisting his brother-in-law Michael Scialfa’s band, Timepiece, during a private party at the Wonder Bar in Asbury Park, New Jersey, Billboard reports. The rock legend sang lead on two covers,…