Nikki Grahame

 is a houseguest on Big Brother Canada 4. She was originally a contestant on the UK version of Big Brother, appearing as a contestant on Big Brother UK 7 and Ultimate Big Brother, and later appearing as a special houseguest on Big Brother UK 16. In 2016, she along with Big Brother Australia 10 winner Tim Dormer was chosen to enter the Big Brother Canada house as a "Wildcard Houseguest".

During her first season on the UK edition of the show, Nikki became infamous for her frequent temper tantrums over minor issues such as the lack of bottled water or the house being too cold. In one particularly notable instance, she repeated yelled "Who IS she?" in the Diary Room in reference to fellow houseguest Susie Verrico. In spite of this, Nikki quickly became a fan favorite, placing fifth in her initial season and being voted the runner-up of her second season.

Biography
Adventurous, brave, and loyal, Nikki doesn’t play Big Brother with any sort of strategy in mind, and just enjoys the experience and people while she’s in the house.

Trivia
- Nikki is currently the only female not to be nominated in Big Brother Canada 4.