Rita Ora blasts an unnamed ex-boyfriend in her new song 'Poison'.

The blonde beauty - who is reportedly dating rapper Richard Hilfiger - has previously been in relationships with DJ Calvin Harris, reality star Rob Kardashian and sports agent Dave Gardner and admits the track is about her ''bad luck'' in her personal life, but stopped short of admitting who she singles out in the track.

Chatting to Clash magazine, the 23-year-old singer shared: ''['Poison'] is about my bad luck with love.''

The lyrics are harsh, comparing her former love to a snake and the devil.

At one point Rita sings: ''Like a serpent/From the Garden of Eden/You are like poison/Running in my blood.

''I open up my windows/I'm so sick of breathing/Every day I'm trying/But I don't remember who I was before you came.''

The feisty singer hasn't confirmed who the song has been aimed at but given her past relationships, it's safe to say she's had a lot of material to work with.

In June, Calvin publicly announced his split from Rita via Twitter and has reportedly offered other pop stars the songs he wrote originally for her second album.

Ex-boyfriend Rob has also been vocal about his relationship with the blonde beauty.

In 2012, the sock designer took to Twitter to rant about his failed romance with the 'Hot Right Now' pop star and even alleged Rita had cheating on him.

He wrote: ''She cheated on me with nearly 20 dudes while we were together... But I mean 20?!!!!''

Ironically, Rita appeared to eventually respond to Rob by saying she wouldn't talk about her relationship in public.

She said: ''When you are involved with someone for a while and they decide to express their feelings to the public, well, that's not my personal way of therapy but I guess everyone takes split-ups differently.''