Today is Sister Rosetta Tharpe Day in Pennsylvania. Not sure of anything significant about 11th January but any day is a good one to celebrate the good sister’s music. BBC Four are showing an hour documentary The Godmother of Rock ‘n’ Roll over the weekend and then presumably on the BBC iPlayer. Hopefully they’ll get to the bottom of whether she really does sing “wankers” on ‘This Train’ (surely not). In the meantime, this’ll whet your appetite.