HOUSTON — George Strait set an NRG Stadium attendance record at his concert on Sunday, but two seats were empty.

According to KTRK , the seats were engraved for George H.W. Bush and Barbara Bush. Flowers were left in Barbara's chair.

The former president and first lady were not only Houston residents, they were lifelong supporters of the Houston Rodeo.

"They had a very special relationship with some of the entertainers, Reba McEntire and Brad Paisley in particular. And when Reba or Brad would play they'd usually come in advance of the show and sit down and visit with them. And then they would enjoy seats right beside the bucking chute," Rodeo Houston President Joel Cowley told KTRK.

Barbara Bush died in April of last year. Seven month later, George H.W. Bush also passed away.