Jessica appeared to be in jovial spirits as she arrived at the world's richest harness horse race, which features a huge $2.1million in prize money.

Later taking to the stage for her live show, Jessica changed into a stylish black leather-look dress as she made sure to capture attention.

She put on a high-energy performance for the eager crowds as she pulled out all the stops to nail her race day entertainment.

Also in attendance at the glitzy event was Love Island Australia star Courtney Stubbs, who put on a leggy display in a black off-the-shoulder mini dress.