"I specifically moved away from the blatant promotions by Fiji and Moet where young women with their trays filled with their wares stood near a designated camera," she wrote.
"I knew why there was a photographer poised there and I moved away as I said out loud that I didn't want to be doing advertising for either.
"Clearly this angle shows that I moved from her being behind me and yet from the side it still happens."
The Halloween star isn't the only one who isn't happy about the Fiji Water Girl's stunt, with several people on Twitter accusing it of an obviously staged advertisement — something Cuthbert has denied.
"I just stand where I'm told, wherever there is an opening," she told Glamour magazine, explaining that she had been "caught between a lot of cameras" on the red carpet.
"You're just kind of trapped sometimes. See that's the thing: I feel like I was looking away, but sometimes I was looking so I could move out of the way," Cuthbert added.
Planned or not, Cuthbert's actions have proved lucrative for Fiji Water, with marketing analytics firm Apex Marketing Group telling Yahoo Finance the viral story was worth about $16.77 million in advertising. The water brand has a history of pulling off viral stunts as part of its marketing strategy.
"Since this went viral it took the (brand) exposure to a new level not seen in prior Golden Globes," Apex Marketing Group president Eric Smallwood said.
"Every table had Fiji, Lindt chocolates and Moët strategically placed during the broadcast, but this was done in prior years as well."