The former couple made an appearance at a memorial concert in honour of ASAP Yams at Madison Square Garden in New York City, reported AceShowbiz.
The 26-year-old singer performed onstage while Hadid hung back with her friend Kendall Jenner in the audience.
Jenner was accompanied by her rumoured boyfriend ASAP Rocky.
It's unclear whether Bella and The Weeknd actually spoke to each other during the night.
Disclaimer: No Business Standard Journalist was involved in creation of this content