The most amazing part, though? They'll only set you back £30 - sound the bargain klaxon!
Tiff proved that she is one of the most style-savvy Chelsea residents ever as she stepped out at the summer bash in this s-t-u-n-n-i-n-g two-piece that boasted a bloom-adorned cropped top with cool slashed sleeves and a matching maxi skirt with a rather dangerous looking front-split!
Thankfully, gorgeous Tiffany managed to avoid giving us a glimpse of her knickers as she sashayed past the paparazzi (phew!) and she kicked the fashion rulebook to the kerb and teamed the busy, ultra-girly look with a pair of snappy neon orange sandals.
She pulled it off a treat, right? Right!
Now, there's no denying Tiff loves a good designer buy (we'd do anything to have a rummage through her Chanel handbag collection - just saying) but she revealed that she is a bit of a bargain hunter at heart when she took to Instagram to share the deets of her OOTN - outfit of the night, obviously!
Tiff drew gasps (of the good kind, duh!) when she pinpointed her blooming beautiful co-ords as an online purchase. The go-to in question? Well, celebrity favourite boohoo.com, of course!
"Get on boohoo now!" one of Tiff's Insta-followers wrote under a snap of her look, while another tagged a friend and said, "Omg, getting this for the weekend."
The stunning blonde - who this time attended the party without sister Lucy Watson - made the most of her bobbed tresses and went all ethereal on us with a single halo braid.
Never one to blend into the crowd, she made a splash with a pillar box red lip and a killer contour, beating the rest of the guests in the style stakes.
Now, er, give us a sec while we locate our credit card...
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