NME reported the pranksters were later outed as Trollstation, known for live pranks including football pitch invasions and faking an art heist.
Honey G, a 35-year-old rapper from Harrow in North-West London whose real name is Anna Georgette Gilford, has attracted controversy for her performances of hip-hop classics.
She's been branded a racist and "a white lady that dresses up in Ali G" clothes by prominent musicians.
Read more: X Factor contestant Honey G 'so wrong on so many levels'
Gilford has defended her style, telling chat show This Morning that, "Any allegations of me being racist are completely false.
"All that stuff to do with me attacking black culture is utterly ridiculous. I've never said anything racist or behaved in that way. Just because I'm pushing music from a black origin doesn't mean I'm attacking black culture.
"They are using the race card against me. I feel like they are discriminating against me because I am white. I'm not the only white person in the world who likes black music.
"There's no evidence, proof or truth that I am a racist."