The singer, 40, has been confirmed as safe and well following the horrifying incident.
ABC News’s Frances Wang tweeted: “His team confirmed w/ ABC News he is OK.”
Aldean was seemingly the final act to perform at the Sunday night concert, starting at 9:40pm local time.
Videos show Aldean still on stage singing as the sounds of gunfire can be heard ringing out.
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Fox News suggests he was in the midst of the final song of his set.
At time of writing, he has not yet taken to social media to comment on the ongoing situation near Mandalay Bay.
Aldean is a massive name in the US, having scored three Number One albums on the Billboard 200. On the US Country chart, he has amassed five. At the Country Music Awards he is a regular fixture, having won multiple prizes. He’s also been nominated for four Grammys.
In 2010 he collaborated with Kelly Clarkson on the song ‘Don’t You Wanna Stay’, which appeared on her Greatest Hits: Chapter One collection as well as her 2011 opus Stronger.
Aldean was last week confirmed for a Country Rising concert on November 12, in aid of those affected by the recent hurricanes in Texas, Florida, Puerto Rico and other areas.
Tickets for that show are set to go on sale this Friday, per an announcement last Thursday.
The shooting began at around 10:30pm local time (5:30am in the UK), with witnesses reporting that hundreds of shots were fired.
Las Vegas police have confirmed via Twitter that they do not believe there are any more shooters, having previously said one suspect was “down”.
Flights have been diverted from Las Vegas McCarran airport.