Robert Pattinson is dating Tahliah Barnett against the demands of die-hard "Twilight" fans, and the singer more popularly known as FKA Twigs has slammed her haters via Twitter.

According to a report from Celebuzz.com , the electro pop musician took to Twitter to indirectly speak about how bullies who are not in favor of her as the actor's girlfriend. Some hardcore fans have even gone to the extent of posting racist comments on the English singer's page.

FKA Twigs posted: "I am genuinely shocked and disgusted at the amount of racism that has been infecting my account the past week."

Robert Pattinson's rumored girlfriend added: "Racism is unacceptable in the real world and it's unacceptable online."

Robert Pattinson has been openly dating Tahliah Barnett for weeks.

According to a report from Daily Mail, the rumoured couple was spotted last week with friends. The hunk actor allegedly "couldn't keep his hands off" the British singer.

Robert Pattison dating Tahliah Barnett is the actor's first seemingly serious and publicized relationship after he broke up with "Twilight" co-star Kristen Stewart last summer.

Daily Mail added that FKA Twigs wants to keep their relationship vague. The electro-pop singer said: "I think that I like to keep my personal life personal, but I'm really excited to be here today and to be talking about my music and my album."

Robert Pattinson appears to be dating Tahliah Barnett more often these past couple of weeks. According to a report from NY Daily News, the two were spotted last week walking hand-in-hand around Venice Beach.

The 28-year-old actor and 26-year-old singer musician were also seen driving around Hollywood a week prior to the Venice Beach sighting, said NY Daily News.

An earlier report from The Sun revealed details of Robert Pattinson dating Tahliah Barnett. "It's the real deal between Rob and Tahliah," said a source said, adding that the two had been able to keep their relationship secret until recently since "they're already smitten".