Watch Roots Perform 'Rapper's Delight' With Philadelphia Mayor

The Roots welcomed an unexpected guest during their Philly’s Fourth of July Jam Saturday night: Philadelphia mayor Michael Nutter, who led the Tonight Show band in a rendition of Sugarhill Gang’s “Rapper’s Delight.” After weathering early microphone troubles, the 58-year-old politician delivered a near-perfect cover of the hip-hop classic, tackling every…