Willie Nelson fans who were anticipating seeing the singer and his family band in Las Vegas this weekend (Jan. 28-29) will have to find other plans: The artist has canceled his shows on Jan. 28 and Jan. 29.

According to a Facebook post, the two Willie Nelson & Family: Vegas on My Mind concerts, set to take place at the Venetian Theatre, are being canceled "due to recent illness;" unfortunately, they will not be rescheduled. Ticketholders can seek refunds through their point of purchase.

Fortunately, Nelson and company's Sin City concerts scheduled for Feb. 1, Feb. 3 and Feb. 4 are not being affected by this cancellation. Tickets for those shows are still on sale; more information about the three remaining Vegas dates, and about the rest of Nelson's upcoming concerts, is available on WillieNelson.com.

Nelson, now 83, still tours regularly. He postponed two shows back in November, in Lubbock, Texas, and Midland, Texas, due to illness as well. The country icon recently revealed in an interview with Rolling Stone Country that he is working on a new album; according to that story, the record is titled God's Problem Child and is set for release in April, although Nelson's camp has yet to officially announced the project.

Willie Nelson Through the Years