John Legend goes back to the ’70s in the groovy video for “Wake Up Everybody,” the first single from Wake Up!, his covers album with The Roots. Mr. Legend takes on Harold Melvin & the Blue Notes’ 1975 classic with some help from Common and Melanie Fiona. The clip was shot by director Gil Green on a rainy Tuesday in Brooklyn at the same spot where Jay-Z reportedly filmed “Izzo (H.O.V.A.).” Can you dig it?