The X Factor judge and 'Boomerang' singer looked gleefully happy as she posed for a series of photos posted to Instagram yesterday (22 October).
We reckon Nicole may have had a sleepover with her X Factor girls category, Hannah Barrett, Tamera Foster and Abi Alton. She said: "Oh just another fun day filming for work! #pigtails #mylittlepony #sleepover."
Nicole, 35, made the most of her "fun" day and began jumping from the bed - as you do!
With her shiny brunette locks tied up in bunches, Nicole showed off her pins in cute tiny shorts, which she teamed with a grey My Little Pony top from high street brand River Island. She completed her look wearing white slippers with a pink bow attached to the front.
This week, Nicole also donned a hair net as she worked a shift in a Greggs bakery store while spending time with mentee Hannah.
Watch Nicole's video for 'Boomerang' below: