Victoria Falls (Zimbabwe) (AFP) - Zimbabwean President Robert Mugabe on Saturday celebrated his 91st birthday with a lavish million dollar bash that was slammed by the opposition as "obscene" in a country wracked by poverty.Thousands of supporters of the ruling ZANU-PF, many wearing party regalia emblazoned with the president's image, sang and danced as he arrived for the jamboree at a luxury hotel in the famed Victoria Falls resort.