Singer-actress Ariana Grande, who is promoting her film 'Wicked: For Good', confirmed that she has been diagnosed with COVID-19. Following the diagnosis, Ariana has cancelled all scheduled promotional activities and taped appearance on 'Kelly Clarkson Show', reported Variety. The news comes amid reports that Grande's 'Wicked' co-star Cynthia Erivo had lost her voice due to reported laryngitis.