The two ladies stepped out for a glitzy award ceremony in London on Tuesday evening (15 October) and, undeterred by the chilly weather, opted for sheer gowns that showed off their petite frames and their choice of undergarments.
Abbey, 27, sported a clingy, black halter-neck dress that featured sheer panels from the waist down to give partygoers a glimpse of her legs and the black bodysuit she was wearing.
She also upped the ante with heavy smokey eye make-up and styled her blonde hair in loose curls.
The Liverpudlian model was at the Attitude Awards with her Strictly Come Dancing dance partner Aljaz Skorjanec, who she also went out clubbing with over the weekend - before falling asleep in the taxi home!
Also turning heads on the red carpet last night was 35-year-old Myleene, as she posed for pictures in an unusual black dress that almost resembled a slinky nightgown.
Opting for no bra, the musician and clothing designer instead flashed her black boy shorts, which were a necessary addition to the outfit since it was pretty much completely see-through!
Given that her frock might not have been too warm, Myleene also sported a cool black leather jacket and vamped up her gothic glam look with a dark red lip.
But this isn't the first time that the brunette singer has given us a peek at her underwear at a showbiz event, as she donned another raunchy and very revealing silver dress at the Classical BRIT Awards earlier this month.
She certainly isn't shy!
Myleene and Abbey were joined at the bash yesterday by a whole host of other famous faces including Pixie Lott, Ellie Goulding and Una Healy and her husband Ben Foden, who looked like a picture perfect couple in their smart attire.