The blonde businesswoman unveiled her new shorter locks at the My Face My Body Beauty Awards in London on Saturday night (2 November).
Stella had tweeted ahead of arriving at the bash how happy she was with her new look, saying: "Wow LOVE my new hair done by the gorgeous @DJLondon1 #MayfairHair #RedCarpetReady x."
She teamed her sleek bob with a show-stopping red dress by Bea Das, matching hot red mani and minimal make-up.
The My Face My Body Awards describes itself as the first consumer awards within the aesthetic, beauty and dental industry to recognise brands for product innovation and popularity.
And clearly Stella had a great night as she tweeted afterwards: "Thank you for a fabulous evening! Wonderfully organised, fantastic food, amazing awards."
The 2010 Apprentice was without new love interest Toby Anstis, although she had no shortage of celebs to cosy up to, including TOWIE's Abi Clarke.
TV presenter Toby confirmed last month that he was dating the mother-of-two, describing her as "gorgeous", adding: "We're just enjoying each other's company. She's funny and makes me laugh."
That was evident at the National History Museum Ice Rink launch last week, where they looked in high spirits as they glided around the rink together.