The Forever Young Rock Choir is preparing to go slightly mad for its performance on September 17.
Now in its ninth year, the choir will sing songs with the theme "crazy" for its annual performance.
Forever Young director Laura Dusseljee said the theme was reflected in the 80 singers energy.
"They just bring so much energy to the party, it's fabulous," she said.
"Somebody suggested 'crazy' because there's so much wonderful repertoire for it, I thought it was a great idea."
The choir is made up of senior citizens aged from 65 years who sing rock songs about love, lust and longing.
This year's set list includes I'm Going Slightly Mad by Queen, Crazy by Willie Nelson and Crazy by Gnarls Barkley.
Girton Grammar School's band will support the choir at its performance at Ulumbarra.
Grace Knight from Australian band the Eurogliders will also perform with the choir.
Other music icons such as Kate Cebrano, Mark Seymour and Normie Rowe have performed with the choir over the years.
"Seeing two generations come together through the medium of rock music is great," Mrs Dusseljee said. "It's music that is pertinent to teenagers and adults alike.
"(Grace Knight) has been wonderful, such a joy to work with. (The celebrities) come to participate happily with their own brand of magic. It's such a collaborative approach with the school's band. It works well."
The Forever Young Rock Choir performs at the Ulumbarra Theatre on September 17.
Have you signed up to the Bendigo Advertiser's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in central Victoria.