On Twitter, Marie had invited audience members who 'followed' her to tweet her their seat number about half an hour before the show started - and Elaine did.
She was shocked speechless when about three number into the show Marie announced from that stage that the winner of her Twitter competition was Elaine.
The pair were ushered out of their seats in block 14 and taken to the two seats in the middle of the front row where they watched the rest of the show. They were given a backstage tour at the show's interval and afterwards met Donny and Marie for pictures, autographs and a quick chat.
Elaine was a MASSIVE Osmonds fan in the 70s and has seen most of their recent UK tours since 2007. She is still recovering from the shock.
Marie tweeted the picture of her with Elaine and Cait to her 87,885 twitter followers and also shared Elaine's comment that she was glad she'd been moved to the front or she wouldn't have seen Marie's fabulous shoes! Fellow Calendar Girls will know Elaine does love shoes! (Sadly, she herself was wearing practical and rather ugly sensible trainers on the night to cope with the ice in the arena car park).
If you are a fan of Twitter, you can follow Elaine at @Ellajp and the Burton Calendar Girls @LTCCalendarGirl