While Queen Bey had to wait out a threat of lightning this week before performing at TCF Bank Stadium, the Queen of Soul has postponed her show Saturday at Treasure Island Casino due to illness.

Aretha Franklin has an undisclosed illness. Her agent told Treasure Island officials that a rescheduled date will be announced in the coming weeks and will most likely be in the fall.

Aretha, 74, who last performed in the Twin Cities at the State Fair in 2014, maintains a limited touring schedule, partly because she travels via bus since she reportedly has a fear of flying. She has two concerts scheduled in June, two in July and one in August.

Beyonce, of course, travels by private plane for her 41-concert Formation World Tour of stadiums.

Treasure Island officials said Aretha tickets can be held for the rescheduled concert or refunds are available at place of purchase.