She was sensationally rumoured to have had a affair with Jay Z.
But reality star Casey Cohen, who starred in the Bravo series Princesses: Long Island, has denied reports that she has slept with the singer, while she is launching a legal battle.
28-year-old Casey was named as Jay Z's mistress in several US magazines, including In Touch, in reports which since appear to have been taken down from the internet.
Denial: Princesses: Long Island star Casey Cohen has rubbished rumours linking her to Jay Z
The reality star's lawyer is reported to have contacted the magazine's publisher, Bauer Media, with a cease and dismiss letter, rubbishing the claim as 'a foul and phony mistress-rumor,' TMZ reports.
Casey reportedly admitted in the letter that she has met Jay Z and his wife Beyonce, but only through her job as a VIP hostess in New York.
She is believed to have demanded an apology from Bauer, and for all posts about her to be removed.
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In Touch Weekly reported earlier this month that hip-hop star Jay Z had allegedly been two-timing his wife with a New York hostess named Casey Cohen, who he reportedly saw at least twice a month.
The allegations came less than a month after a video surfaced of Beyonce's sister attacking Jay Z in an elevator at the 2014 Met Gala – supposedly for having a girlfriend on the side.
The cheating rumours are new for the couple, who are extolled as having one of the best marriages in music.
The couple are currently preparing for their joint On The Run tour, which begins in Miami on June 25, with sell-out tours throughout the States.
Princesses: Long Island chronicles the lives of Cohen and a group of single young Jewish women aged 27-30, who still live at home with their parents.
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