"About last night, surprise. So epic to perform The Power at @manningcartell show for @ausfashionweek. Vanessa, Cheryl and Gabrielle are fashion women warriors, sisters who have created so many incredible looks throughout so many years and continue to soar!" she wrote.
"I am obsessed with their new collection and honoured to have sung amongst all these gorgeous, stunning, strong, beautiful women power walking beside me."
Delta added: "Fam bam affair backstage with my girls (and my man) @ashleighlarden @jess_pecoraro @__victoriaknowles @nonismithmakeup @dianegorgievski @matthew.copley @deannarhule and the legend that is TK. Thank you to my team!!"
In one snippet of the video montage, however, fans noticed a sweet private moment Delta and boyfriend Matthew shared before the performance.
"Love your little pep talk with @matthew.copley," remarked another.
Romance rumours began in early 2018 when Delta and Matthew were photographed kissing in Hawaii but it wasn't until January 2019 when the couple went Instagram official.
However, Delta isn't one to share too much of her relationship with the world.
“I am pretty consistent with saying to people that my private life is my private life, but we are spending isolation together and, in our household, we’re both performers," Delta explained to Stellar Magazine in May 2020.
"It’s a relationship of respect. Matt is an incredible musician and we really enjoy working together. Music is how we met, it’s what we both do, so it’s really about just being creative in the household.”