With 20 minutes left until kickoff, Stevie Wonder took the stage on the 50 yard line with India Arie, Joss Stone, and John Legend.  They sang some of Wonder’s most memorable songs as well as some Motown standards - very appropriate for Detroit.  As usual, the awful sound engineers of these live events had to screw it up by accidentally muting microphones when they weren’t supposed to.  At least there was no lip-syncing involved in the affair.