Wynn Resorts spokeswoman Jennifer Dunne says there's no deal yet, despite published rumors of a lucrative, long-term contract.
Beyonce appeared at the resort from July 30 through Aug. 2 this year while filming a concert DVD. Her shows helped boost visitation to Wynn and its sister Encore Las Vegas resort during a typically slow tourist season in Las Vegas.
Beyonce sang in the Encore Theater, where country star Garth Brooks plans to play a series of solo acoustic shows starting on Friday. Brooks' deal puts him in Las Vegas 15 weeks a year for possibly the next five years.
