Annie Lennox at the GBC Conference , Washington DC 2010. Live acoustic, solo performance of Bridge Over Troubled Water, There Must Be An Angel, Sisters Are Doin It For Themselves. Annie Lennox attended the GBC conference and Awards dinner in Washington on June 8th 2010. The GBC conference is a place where the private sector come together with leaders of government, nonprofits, and multilaterals with a common focus on health and development. Annie made a special appearance during The Excellence in Business Action dinner on HIV/AIDS, TB and Malaria, an extraordinary event where all sectors come together at a very high level around health and development.