Complex sentence: Eric Idle was a popular addition to the 2012 Summer Olympics closing ceremony at the Olympic Stadium in London on 12 August, performing "Always Look on the Bright Side of Life".
Split into simpler sentences: Eric Idle was a popular addition to the 2012 Summer Olympics closing ceremony at the Olympic Stadium in London on 12 August. In the spirit of the Olympic Games, Idle sang "Always Look on the Bright Side of Life".