Jacqueline Ellen Henderson (born 31 January 1975), better known as Jackie O, is an Australian commercial radio host, television presenter, and actress. She is best known in Australia for presenting The Hot Hits Live from LA, Hot30 Countdown, Take 40 Australia, two series of Australian Princess, and The Kyle and Jackie O Show (with co-host Kyle Sandilands). 　　She has also hosted celebrity prank show Surprise Surprise Gotcha and appeared on the 2007 comedy series The Nation on the Nine Network. She also was the co-host of Big Brother Australia (alongside Kyle Sandilands) after Gretel Killeen, the original host, resigned from the series. 　　On 1 November 2013, Jackie and co-host Kyle Sandilands announced they would not be returning in 2014 to host their 2Day FM breakfast show, which at that time was generating around 30 million AUD in advertising revenue yearly. On 29 November the duo, Kyle and Jackie O announced their move to rival radio network ARN and show on new 106.5 station, coming in 2014 with a nightly, "Best Bit's" program networked around ARN stations, Australia wide.