"I did not sign a deal with anyone!!! Sorry for the false info corny ass people HAD access to my page….," she tweeted.
Earlier, a tweet appeared on Lumidee's page stating, "I Just signed a Deal With #YMCMB :D," which was then removed.
Lumidee's most recent release was the 2011 single "Dale Mami," with rapper Somaya Reece.
Cash Money Records CEO Birdman and Young Money founder Lil Wayne were silent on the false news on Twitter, though Birdman boasted about the label's future signings on the social networking service on Saturday.
"What who we sign Next gone f*** the Worldup.YMCMB," he tweeted.
The labels recently announced the signing of alt-rock veterans Limp Bizkit. According to XXL, YMCMB could release many as 16 albums in the next six months, including sets by Bow Wow, Lil Twist, Busta Rhymes and Mystikal as well as Nicki Minaj's much-anticipated "Pink Friday: Roman Reloaded," which is set for April 3.