Credit: Michael Caulfield/WireImage

The day after Jordin Sparks dropped out of performing at America’s largest Earth Day celebration, her rep has released a statement saying that the singer is resting her vocal cords.

“Jordin Sparks is on vocal rest and is expected to make a full and complete recovery,” Sparks’s rep tells PEOPLE. “She looks forward to joining Alicia Keys on tour in May. Sparks has been going non-stop over the past two years and now she’s going through the normal course of learning how to manage and care for her voice.”

The statement adds: “Jordin appreciates the outpouring of concern and well-wishes of her fans as she recuperates at home.” Sparks also canceled a Saturday performance at Penn State.

Sparks, who was set to perform the National Anthem in Washington at the third annual Green Apple Festival with Earth Day Network, has been replaced by American Idol runner-up Blake Lewis. — Steve HellingMichael Caulfield/WireImage