his band’s website on Friday that “due to a positive Covid case in the Willie Nelson Family Band” two upcoming shows scheduled to happen May 6 and May 7 would be postponed and that Nelson’s Sunday performance at Jazz Fest would be cancelled.Nelson was slated to close the Gentilly Stage — the same stage where his son Lukas Nelson is performing earlier in the day with his band the Promise of the Real. No replacement for the elder Nelson has yet been announced.The news comes after Melissa Etheridge announced Thursday that she would not be able to perform Saturday at Jazz Fest due to “COVID hitting my crew.” Mavis Staples will perform during that time period instead.“Oh my heart hurts not to be there.