Luisa fought off tough competition for the gong at the National Reality Television Awards, not only from Leah but also from TOWIE's Lucy Mecklenburgh and Jessica Wright, Made In Chelsea's Millie Mackintosh and Lucy Watson and I'm A Celebrity...Get Me Out Of Here! star Helen Flanagan.
But beating her close friend and fellow Apprentice candidate Leah appeared to be victory enough for Luisa.
After winning the award, Luisa retweeted a comment made by Leah on Twitter. Lord Alan Sugar's latest business partner had jokingly made reference to the 2009 MTV Video Music Awards when Kanye West tried to grab Taylor Swift's gong off her.
Leah said: "@TheLuluLife ermm I didn't win?? I was robbed!!! Good I wasn't there or we may have had a 'Kayne West/ Taylor Swift' award wrestle moment."
It was all taken in good grace and Luisa - who wore grey wrap dress and her hair in a messy bun - also shared a photograph of herself while clutching her prize.
Alongside it, she commented: "I won!! Best Female Personality, thank you all so so much so happy and humbled xxxxxxx"
Watch Luisa's sparkling personality in her audition video for The Apprentice below!