"Jay, Chris Martin, CC Sabathia, Robinson Cano and about 15 others took the tube to the show," a source told the magazine. "Fans went nuts on the train and in the walk to the O2 Arena."
"[Jay Z] got on the same carriage as us at Waterloo station," a witness told UsMagazine.com. "It was the Jubilee Line."
Jay Z headlined the Saturday show, which featured guest appearances by Martin and Timbaland.
Notable deaths of 2014 [PHOTOS]