Los Angeles [US], August 11 (ANI): Veteran singer Rod Stewart ain’t well. He recently tested positive for COVID-19, leading to the cancellation of his upcoming concerts. Rod’s health update was shared via a statement on his official Instagram account on Saturday. “We regret to announce that tonight’s Rod Stewart concert in Stateline, NV and his August 10 show in Lincoln, CA have been postponed, as the singer recovers from a summer strain of Covid-19,” the post read. The shows have already been rescheduled, his team announced in the same update. As per Billboard, Rod, 79, is set to perform at T…