They split in December 2014 but have remained amicable — and even run their own wine company, Hudson Bellamy Wines.
Us also broke the news last September that Hudson and Nick Jonas had been hooking up.
The American DJ, real name Thomas Wesley Pentz, brought his two young sons, Lockett Pentz and Lazer Pentz, alongside him to enjoy music's biggest night.
Rumours have been swirling of late, that she has been quietly dating Tyrone Wood, son of Rolling Stones legend Ronnie Wood.
But on Tuesday night Rita Ora enjoyed a night out with DJ Diplo in New York, who she was previously linked to after she was pictured holding hands with him at the May Met Gala after party.
Rita, dressed in a quirky multi colour fringed gown teamed with Dr Martens, showed off her bright yellow manicure as she covered her face.
Carrying a bright Louis Vuitton clutch, they made a swift getaway from the club.