Rita Ora is baring her claws over a ridiculous rumor started by a U.K. reality star suggesting that she is sleeping with her mentor Jay-Z. While Ora usually seems so sweet and cute, she has proven that she won't take trash talk lying down. No pun intended, of course.

Ora was dogged by some ugly cheating rumors at the end of 2012 when her ex Rob Kardashian spewed venom on Twitter, accusing her of sleeping with lots of other guys during their time together. She kept rather quiet about that mess, but she couldn't help herself this time out and responded to Holly Fagan of the U.K. reality show 'Geordie Shore,' who for some strange reason suggested that Ora was getting down and dirty with the very-married-to-Beyonce rap guru.

Fagan was tweeting about cheaters, posting: "'You are all thick if u think just because someone's absolutely stunning they won't get cheated on...Cheryl Cole? No relationship is perfect."

She then launched an attack on Ora, saying, "I've been told to say that Rita Ora has been ALLEGEDLY ***** Jay Z! I repeat ALLEGEDLY."

Who told her to say that and why?

Ora's response tweets have since been deleted, but she fired back fast and furiously.

You can see the tweet heat here. We're not sure why Fagan chose to stir this pot, but she did.

Ora basically said she says silent on rumors but couldn't do it any longer, referring to Fagan as a "Z-lister" who is seeking attention by speaking about her and her family. She only responded due to the ridiculousness of the claims.

Watch the Rita Ora 'How We Do' Video