The 46-year-old was all smiles while checking in with fans during King Charles’ Coronation weekend.
Former EastEnders star Martine opted for a casual look, wearing a simple T-shirt tucked into a pair of wide leg jeans.
The Perfect Moment singer accessorised for the occasion with some Union Jack sunglasses and assured her followers she, husband Jack McManus and their son Rafferty, seven, would be proudly waving their flags.
Martine captioned her Instagram upload: “Still adding a slight touch of the Coronation celebrations into the mix for my outfit today.
“Jack, Rafferty and I, have our Brit sunglasses and flags to wave!”
She added: “Hope you are all enjoying your second bank holiday so far… How lovely! I could get used to this!”
Fans rushed to send compliments, with one commenting: “Looking fabulous ❤️.”
Another said: “I mean how lovely are you 🙌❤️🙌.”
And a third added: “You look beautiful and so happy xxx.”
Opening up about her secret to looking great, Martine previously confessed that she was a fan of the Cambridge Weight Plan diet.
She said: “I’ve spent so long fighting to feel healthy again, I didn’t want to do anything too drastic that was going to make me feel lousy.
“But after having Rafferty I found it so tough to lose my baby weight and that does start to affect your self-esteem.”