Donny Osmond and Marie Osmond performing at The Osmonds 50th anniversary held at The Orleans Hotel Showroom. Las Vegas, Nevada - 14.08.07

The singers will also perform at the big show, which takes place at the Planet Hollywood Resort + Casino in Las Vegas.

The event will mark the first time Donny and Marie Osmond have hosted a prime-time show together since 2000.

The current Miss U.S.A., Rachel Smith, will give up her crown just before the glitzy glamour show.

Source: WENN