Conversation so far:
What did Sandilands do on the radio?
In 1999, he moved to Sydney, and commenced at 2Day FM as host of the Hot30 Countdown, replacing "Ugly Phil O'Neil", a former husband of Henderson (Jackie O).

Question: What else is significant about this?
Self-contained rewrite: In addition to moving to Sydney, what else is significant about Kyle Sandilands being a host of the Hot30 Countdown in 1999??