Kyle Sandilands and Tegan Kynaston arrive late for his birthday cruise on Sydney Harbour

Jackie 'O' Henderson attends Kyle Sandilands' lavish 50th birthday party aboard a yacht

Inside Kyle Sandilands' WILD yacht party: KIIS FM star makes an entrance at his 50th birthday bash

Kyle Sandilands is presented with a lavish three-tiered 'King Kyle' cake at his birthday