Last Saturday, April 16th 2011, the A State of Trance 500 worldwide celebration ended in Sydney, Australia. The grand finale was held in the sold out Acer Arena, where Armin van Buuren performed along with Shogun, tyDi, Menno de Jong, Aly & Fila and Alex M.O.R.P.H.
Dancefoundation was there to capture the amazing atmosphere in this video report.
Also check on Youtube.