The TOWIE star showed off the results of her fitness regime in a figure-flattering evening gown as she joined the rest of the Essex gang for the outdoor ceremony.
Lucy kept her make-up and jewellery simple, but went for a showstopping updo for the romantic occasion in Essex, that will be broadcast on the ITV2 show.
Lucy certainly proved she is the best advert for her latest venture, a fitness and nutrition website called Results With Lucy, which aims to share her tips and advice with others hoping to tone up.
Reveal readers recently voted in their droves to name Lucy as having the best celebrity bikini body - and it's not hard to see why.
One reader told us: "Lucy has the perfect hourglass figure that isn't too skinny. Most importantly - she looks healthy."
> The top celebrity bikini bodies as voted for by Reveal readers