Piers to quit 'America's Got Talent'
Piers Morgan's announced he's quitting America's Got Talent.
He says juggling being a judge on the show and his CNN programme is "harder than it looks".
He's going to focus on his chat show.
Morgan says the last 6 years on the show have "been a blast".
Last year he stepped down from Britain's Got Talent because of his commitments in the US.