Paul McCartney and Kanye West at the 2009 Grammy Awards. The two collaborated for the surprise new track "Only One." Kevin Mazur/WireImage D’Angelo notwithstanding, there were no Beyonce-esque surprise albums for the end of 2014. But as the clock turned on another year Wednesday night, Kanye West unveiled “Only One,” a minimal, poignant new track featuring Paul McCartney on keyboard. The song is a