With her own clothing collection and killer sense of style, we couldn't think of anyone better to dish the dirt on the best glitzy frocks for the festive season.
But while Lydia was talking through her favourite party looks, it was her own chic and sophisticated outfit that caught our attention!
The designer looked drop-dead gorgeous as she posed outside the ITV studios in a pencil dress, £50 from River Island, which featured a cute Peter Pan collar and nipped-in waist.
The pretty floral print is clearly a hit with celebs as we recently spotted Little Mix's Perrie Edwards wearing the matching top during her own appearance on the daytime TV show.
Lyds added a touch of luxe with towering monochrome heels by Chanel, completing her ensemble with pearl earrings and a silver ring.
The starlet also took the opportunity to show off her brand new hair colour, which came courtesy of hair supremo Malcolm Murphy.
Yesterday (9 December) Lydia kept us guessing by posting a photo of herself sitting in the hairdresser's chair, flaunting a head full of foils and adding the caption: "????"
But after spotting her barnet overhaul in all its glory, we reckon Malcolm did a great job.
Her previously mega-dark locks have been lifted to a lighter brunette hue, complete with caramel and auburn coloured highlights for a multi-tonal effect.
She complemented her new 'do with Barbie pink lippy and bold brows, finishing her ladylike outfit with an immaculate pale green mani.
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What do you think of Lydia's outfit? Let us know by commenting below as the best comment across the site each week wins £50!