The 'Mad Men' actress is the face of the British fashion designer's 'Get a Life' Palladium Jewellery Collection and was there to show her support as she launched the range as well as the store.
Christina looked her stunning curvy best in one of the designer's iconic corset tops, cigarette pants, black peep toes and a gold sparkly oak leaf brooch from the range.
Christina has previously spoken of her admiration for Vivienne and was thrilled when she asked her to get involved with her new jewellery collection.
She said: "I just love her. I would wear her clothes every day if I could. I've been fairly vocal about the fact I've been a fan of hers for years, so there was no way I wasn't going to do it."
The jewellery takes inspiration from nature and symbols of paganism and the elegant pieces from the couture and commercial collections have been delicately crafted from the precious metal Palladium, a naturally white, rare metal belonging to the platinum family.
The commercial collection draws from the same inspiration featuring acorns and oak leafs in pendants, earrings, bracelets and rings.
The collection is available from the Vivienne Westwood Conduit Street boutique in London and the Los Angeles boutique from March 2011 onwards.