http://www.coldplay.com/song.php Code (markup): Go put your email and download the song vivalavida_thinwhitedukemix, free from coldplay.
You could've maybe used that rare and hard to find search engine, Google, to check for yourself. Looks legit to me. The Coldplay website SUCKS, btw, so I wouldn't waste any time looking around it unless you are a huge fan and like trying to decipher hieroglyphics - if all you want is the free song just go for the download page (/song.php).