The 'R.I.P.' singer – whose relationship with Rob Kardashian ended acrimoniously after he accused her of cheating on him – admitted she would like to have sex with the 'Twlight Saga' hunk.
During an interview on 'The Kyle And Jackie O Show' on Australia's radio station 2Day FM, Rita was asked who she would “shag, marry and shoot” out of a list of Robert, Rob and Robert De Niro,
She said: “OK here we go, I would marry Robert De Niro, I would shag Robert Pattinson and I would definitely, definitely, shoot Rob Kardashian.”
Last year Rob posted a series of venomous comments on his Twitter page accusing Rita of having "unprotected sex" with 20 other men while she was with him.
However, Rita has claimed she had to end it with Rob because she didn't have any time to see him.
She said: "I'm not going out with Rob. We were close for a while, but it didn't work because I was never there. I was like a ghost. I used to get so frustrated with myself and then wonder why I was angry, so I decided it was best to keep it friendly - especially at the moment,
when there's so much going on."