When the elevator comes down, Rachael is on the trail of the "Mother of All Mystery Tasters"! She remains unsure about who it is until she uncovers that this guest is from Utah and has a stage partner. She makes an instant match and asks "Is it Marie?" as Marie Osmond walks out to greet her.

"It's so great to be here! I wanted to come see you and it's great to be in New York," says Marie, who flew in from Las Vegas, where she is back on the stage with her brother, Donny. "We're having the time of our lives. I moved to Vegas, moved my whole family ... The shows are doing fantastic, they've asked us if we want to stay until 2012!"

She and Donny have enjoyed sharing their fun-loving sibling rivalry on stage since the 1970s, and the now-mother of eight is thrilled to keep it going. "We always knew we'd do something together again and being at the Flamingo Hotel, it was perfect because flamingos live in flocks of 10,000 - very much like Osmonds!"