Context: The mass shooting occurred between 10: 05 and 10: 15 p.m. PDT on October 1, 2017 (the third and final night of the festival). When the shooting began, country music singer Jason Aldean was giving the closing performance in front of an audience of about 22,000.\n\nQuestion: who was playing when the vegas shooting started?
Please answer and provide answer explanation.
country music singer Jason Aldean
To answer this question, we should know that: When the shooting began, country music singer Jason Aldean was giving the closing performance in front of an audience of about 22,000.

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Final answer: country music singer Jason Aldean