The 'Celebrity Juice' team captain was keen to show off her most famous assets as she trotted around the bashes put on by the various record labels.
Holly wore a LBD with a plunging neckline, finishing off her look with a slick of red lipstick.
Team HuffPost caught up with Ms Willoughby inside the Warner Brothers Brits bash held at The Savoy Hotel, where she was heading to the exclusive VIP area.
Telling us she'd already been to another party on a boat and was having a fab night (not to mention giving us a peck on the cheek *blushes*), she was soon catching up with Radio 1 DJ Nick Grimshaw and Noel Fielding, who were partying with Jack Whitehall, Jamie Winstone and Miquita Oliver.
We're pretty sure there'll be one slightly sore head sat on the 'This Morning' sofa today.