The 2-0 triumph sees Barca all but declared Liga champions.
During the game, Barca fans swapped the traditional chant of 'Ole, Ole' during passing sequences for 'Why? Why?'.
The Nou Camp crowd were taking the mick out of Mourinho, who kept asking 'Why?' when complaining about the refereeing during the post-match media conference for the first-leg of their Champions League semifinal defeat to Barca.