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The American actress wore the trendy black and white gown with a matching choker to a sophisticated Afternoon Tea, while former Towie star Lucy paired hers with a black clutch bag as she attended a winter launch for lingerie brand Boux Avenue.
Yet they could have been left red-faced if they’d bumped into each other, with their glitzy shindigs taking place less than 15 minutes apart.
photos:formal dresses uk
Both Lindsay and Lucy opted for black heels as they kept to the monochrome colour scheme of their smart yet sexy outfits.
The reality TV star chose to keep her poker-straight locks down and tucked behind her ears in a glam style, while keeping her make-up natural.
Meanwhile Mean Girls beauty Lindsay plumped for a more dramatic look with her flame-coloured hair tied back and a splash of eye-popping pink lipstick.
She posed with Alessandro Grassini-Grimaldi and Hofit Golan at the fundraising food-fest at Morton’s Club, which was in aid of the Nadedza Foundation.
After having her picture taken with the group, she beamed with glee as she sat down in front of a two-tier cake stand crammed with sweet and savoury treats.
It was all about the shopping for businesswoman Lucy, who left the fashion event carrying a huge pink bag of goodies.
She too looked chuffed as she clambered into a waiting car with her haul.
Lucy spent the evening with a host of famous faces including Made in Chelsea's Nicola Hughes, Tiffany Watson and Toff.
Olivia Cox channelled the sophisticated black and white trend while Brian McFadden's ex Vogue Williams stunned in a black top with a plunging neckline paired with a flirty red skirt.
Meanwhile Towie's Chloe Lewis found herself sharing the same party space as ex boyfriend Jake Hall's new girlfriend, The Real Housewives of Cheshire star Misse Beqiri.
The Essex beauty and The Real Housewives of Cheshire star both chose to show off their ample cleavage on the night.
Chloe looked stunning as she arrived wearing a chic camel coat wrapped around her shoulders, before taking it off to reveal her plunging black formal dresses.
She accessorised the look with a large belt and added height to her toned legs with heeled sandals.
Meanwhile Missé opted to go braless as she rocked a plunging bodysuit teamed with PVC leggings.
She wore a denim jacket off her shoulders while she completed the look with strapped heels and loosely tousled locks.