The 36-year-old said she kept saying: "No," and added: "He just ignored everything I said to him."
The woman was giving evidence at the trial of Garry Meldrum, 24, who denies repeatedly raping her in Norfolk Street in the Gorbals on October 27 last year.
The High Court in Glasgow heard she had gone to an event at the O2 Academy dressed up as the Bride of Dracula and was wearing a white wedding gown.
She said she was walking towards Bridge Street subway station when a man approached her then raped her twice.
The trial continues.