The Queen of R&B Mary performed her brand new soulful single 'Therapy' from her album The London Sessions, which is due out next Tuesday. I've sampled this album already and let me tell you, she more than delivers. Sheesh! British soul singer Sam Smith actually wrote this song and watched Mary perform in the front row, commenting that it was 'Such an honour to witness this legend sing one of my songs tonight. Thank you for guiding me and being such an amazing friend.'