The Boys and Girls hitmaker was sitting on a table next to the band at a party, and she fled to the bathroom when one of the group approached her and threw up all over her outfit.
She tells Britain's Daily Star newspaper, "I was at a party and Roll Deep were on a table next to me. Next thing I knew, one of the boys from the band stood up and was sick all over me. It was terrible. I had to go to the toilet, take my long socks off and throw them in the bin (trash)."
The grime group has previously featured rappers including Dizzee Rascal, Tinchy Stryder and Wiley.