The couple, who split earlier this month, were all smiles as they danced together at the event.
New judge Motsi Mabuse also made her debut alongside Shirley Ballas, Craig Revel Horwood and Bruno Tonioli.
At the 2019 MTV Video Music Awards, the rapper will finally be honoured for her must-see music videos, years after fans started lobbying for the recognition.
The 24-year-old had been linked to a spot in the jungle.
The badass baker and decor diva (her words) spills all about her time on the hit Air BnB show.
Tanya died in July after a long illness at the age of 53.
She played the city two years after 22 people were killed at her Manchester Arena concert in a terror attack.