I saw ACDC in 1974 at a local school hall in Kingsgrove, Sydney Australia before they were famous. You could tell then that they were going to rock the planet.

Saw David Bowie in 1978 at the Sydney Showground, BB King in 1998 (I think) when he toured Australia, but the best shows were the Stones in 1995, 2000, 2005 and 2014.