"Who's registered to vote?" she asked concertgoers during Saturday night's show. "I don't care who you vote for as long as you vote for Obama."
The remark prompted boos from her fans to which she responded: "Seriously, I don't care who you vote for. ... Do not take this privilege for granted. Go vote."
Notable deaths of 2014 [PHOTOS]
S Club 7 to reunite for BBC charity event