R. Kelly has been rushed back to Chicago for medical treatment, after complications – it’s believed – related to last year’s surgery on his throat.

A statement released by Kelly’s camp explains that “while on his way to New York this morning to celebrate the publication of his long-awaited memoir SoulaCoaster, multi-platinum R&B superstar R. Kelly was taken ill and had to return to Chicago for medical treatment. Initial indications are that he is suffering from complications from surgery he had last year to treat an abscess on his vocal cords.

“As a result, Kelly has had to cancel appearances on The Jimmy Fallon Show and NBC’s Today as well as a book party that was being held in his honor. It is unclear how long Kelly may be sidelined.”

Kelly went under the knife for treatment on the aforementioned abscess last Summer, but it was believed that the singer had made a full recovery.