The pop star celebrated in style at a rooftop pool party in the sunshine.
She shared a snap surrounded by some of he closest girlfriend with the caption: ‘Hen dooooo!’
The star got engaged last year after her fiancé, footballer Wayne Bridge, surprised her with his proposal.
She later revealed: ‘I didn’t know my dogs were there and they came in in little bride and groom outfits. And Pixie had the ring around her neck on a ribbon.’
‘I think for people who aren't dog fans it's a bit of a weird proposal so I feel like I only want to tell people who like dogs.’
Wayne’s nerves about the proposal had made Frankie suspect something was wrong with their relationship.
‘He'd been acting so weird that when he left to come back in and do the whole proposal thing in my head I was thinking "oh no we've become one of those couples that can't make conversation at dinner".’
'I was panicking! But it was because he was pooing himself all night. And then my family came in and surprised us.'
The bride-to-be welcomed the couple's first child, son Parker, last year.