Alicia Keys joins Coldplay on stage in Tokyo

Alicia Keys joined Coldplay to perform the band's song 'Clocks' during their headline slot at the Summer Sonic festival in Tokyo on Sunday. Chris Martin officially introduced Keys onstage by calling her "the most beautiful woman in the world... except for my wife". However, he had already dropped a fairly big hint of what was to come earlier in the set when, during their performance of 'Politik', he changed two lines to "60,000 Japanese people watching us / Let Alicia Keys always play with us".