Former Destiny’s Child singer Kelly Rowland and Mexican singer-actress Paulina Rubio are in negotiations to join Fox‘s The X Factor alongside Simon Cowell and Demi Lovato. They’d be filling the judges’ seats vacated by LA Reid and Britney Spears. Both have previous experience: Rowland served as a judge on the award-winning eighth season of the UK version in 2011, while Rubio was a coach on the second season of La Voz… México. In March, she also signed on as a coach on Telemundo’s children’s singing competition show La Voz Kids, airing this spring. X Factor US is set to film auditions in Charleston, SC, this Tuesday and Wednesday. That leaves little time for the ink to dry ahead of an official announcement from the network, which Cowell tweeted will be revealed Monday. X Factor‘s third season will debut this fall.