The singer, 43, dressed to impress in a kimono-style frock as she attended the star-studded soiree held inside London's Victoria and Albert Museum.
Upping the sex appeal, the mum-of-two exposed a hint of her black lace bra in the plunging dress, which she paired with red heels.
A myriad of necklaces and a tassled black handbag completed Louise's bohemian style.
The former Eternal star has a keen eye for fashion, having launched her own style blog with pal Emma Rose Thatcher.
The Sun's Bizarre column also revealed last month that she is partnering up with Harvey's Furniture on a new range.
Louise, who is attempting to relaunch her pop career, is in talks to work with the high street furniture chain — with a reported £100,000 on the table.
Louise admitted she longed to return to performing after the “buzz” of the BBC1 dance show, where she was partnered with Kevin Clifton, 35.
She said: “Looking after the house and my family was reality. I’d become a Stepford Wife, wanting to be perfect at it.”
A source said: “Louise is excited by the prospect of this lucrative furniture campaign and thinks it will show off her creative side.
"She spent years making her home with Jamie beautiful and now she can show off her interior design streak.”
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