Alicia Keys gave a surprise performance at Kings Cross Station in London on Monday. <br /> <br />The American singer-songwriter surprised commuters by playing a handful of her greatest hits. <br /> <br />The Grammy-winner played on Elton John's piano, which is located on the concourse of the station. <br /> <br />The crowd cheered and sang along to the songs: "If I Ain't Got You," "Empire State of Mind" and "Lifeline." <br /> <br />The impromptu gig followed Alicia Key’s performance at Capital FM’s Jingle Bell Ball over the weekend. Report by Fatimaz. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
