The Respect star was scheduled to perform at Sarasota's Van Wezel Performing Arts Hall on 29 March (16), but on Monday (14Mar16), venue officials announced Franklin had decided to call off the gig since she wouldn't have a proper band behind her.

The much-anticipated show sold out quickly, but now the more than 1,700 ticketholders are out luck, as the singer is not expected to reschedule the date.

Franklin also axed a planned concert in nearby St. Augustine on 24 March (16), and a statement on the St. Augustine Amphitheatre venue's website cites "unforeseen circumstances" for her abrupt cancellation.

However, the star is still expected to perform at the Jazz in the Gardens Music Festival in Miami Gardens this Saturday (19Mar16), when she will headline the 11th annual event at Sunlife Stadium.

Other performers set to take the stage at the weekend-long festival include Usher, Janelle Monae, Kenneth 'Babyface' Edmonds, Kool and the Gang, Average White Band, and Michael MCDonald, among others.

The cancelled Florida shows mark the third time in the past year Franklin has unexpectedly called off concerts. Last August (15), she postponed a planned appearance at The Colosseum at Caesars Palace in Las Vegas due to exhaustion, and in October (15), she axed two gigs in Oklahoma, amid fears she would not be able to cope with the gruelling travel schedule.

At the time, she said, "After such a long, 4,200 mile drive to the West Coast in July, I'm not prepared to drive as far west so soon again. I am so sorry to have to disappoint my fans there, but I will reschedule."