The band's lead singer was shocked to find the man within the grounds of the house he shares with wife Gwyneth Paltrow and their two children Apple, seven, and Moses, five, but stopped to listen to a few of his renditions before kicking him out.
He told the Daily Mirror newspaper: "I had a guy the other day who climbed over the gate of our house and started singing Coldplay songs to his friends on the street."
Instead of being too upset, the 'Every Teardrop is a Waterfall' star pointed out the man wasn't hitting the right notes, telling him: "Listen, you're just not doing that right."
He added: "He politely left. It was bordering on intrusion. Still, it's nice that people like the songs."
Chris has had a great 2011, with Coldplay releasing their fifth album, 'Mylo Xyloto', and he's hoping to get 2012 off to a clean start by cutting out his bad language.
He said: "The only thing I am sure of is I won't be swearing as much next year. My swearing has been terrible recently. I'm sorry to everyone. But we're all very happy."
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