ERIE, Pa. (AP) _ Willie Nelson has canceled concerts for the next two months to have surgery for carpal tunnel syndrome, a promoter said.

The 71-year-old country-western star, whose hits include ``Whiskey River'' and ``On the Road Again,'' was apparently in so much pain he couldn't finish a show Saturday in Las Vegas.

``Willie Nelson will have surgery to relieve extreme pain caused by carpal tunnel syndrome,'' Carlos Larraz, a promoter with National Artists Corp, said Monday.

Nelson had ten concerts scheduled for the remainder of May and June, including an appearance at the three-day Bonnaroo Music Festival in Manchester, Tenn., beginning June 11.