The grand final of the Eurovision Song Contest has kicked off in Liverpool with a flag parade featuring the countries vying for its coveted glass microphone trophy.The Princess of Wales made a surprise appearance playing the piano in a pre-recorded opening video featuring last year's winner's Kalush Orchestra.

The grand final of the Eurovision Song Contest has kicked off in Liverpool with a flag parade featuring the countries vying for its coveted glass microphone trophy.The Princess of Wales made a surprise appearance playing the piano in a pre-recorded opening video featuring last year's winner's Kalush Orchestra.