Sibling singers Donny and Marie Osmond will be singing at the Flamingo Las Vegas at least through the end of 2015.

Caesars Entertainment Corp. announced Monday that the duo has signed on to keep performing at the hotel-casino through the end of next year.

The pair is still performing more than six years after they committed to six weeks of shows starting in September 2008.

The 90-minute variety show is scheduled to have performance dates every month in 2015 except in March, July, August and December.

Tickets cost $95 to $260, not counting taxes and fees.