Miley Cyrus could cost NBC big money.

According to TMZ, the singer's July 6th prime-time special had viewers lodging complaints over her risque costumes as well as her rolling around in a bed with half-naked men and women, and grinding against a dancer dressed as Abe Lincoln.

The FCC is now investigating whether Miley Cyrus: Bangerz Tour violated its rules against broadcasting "sexual or excretory activity."