We used a pink cupcake as her reinforcer/motivator/bribe. We let her smell it and stim on the sight of it beforehand. She was beyond excited:
"Cupcakes are my favorite treat for so many kids."
"The sprinkles are lavender. That's a fancy word for light purple." (Source: Fancy Nancy at the Museum)
"The flowers look Battery-Charged Blue, not Blue Lagoon or Raindrop Blue." (Source: Crayola Marker obsession)
I wrote her a social story to prep her for the big day. It covered everything from describing the venue, to telling her to bow when she was through and clap for the others. Just as important as her performing her song was her being able to behave and sit through everyone else's performance.
Here's a snippet of her reading the social story...you can see which part of it most excites her:
She ended up doing great on all counts. The recital only lasted a half hour in total, and she did not "dance or run around" and actually seemed to enjoy watching the other kids play. Her piece was "Nocturne" by Chopin:
OK, so I didn't make it clear that she had to stand up before she bowed. I can't think of everything. Then, finally, after a grueling 10 minute drive back home, she got her just desserts...