Gwen Stefani announced on Tuesday, July 22, she has canceled her Wednesday Las Vegas residency performance at Zappos Theater at Planet Hollywood. “I am so upset to share that I am unwell & will not be able to perform my Vegas residency show tomorrow night,” Gwen told fans in an Instagram post. “I was so looking forward to seeing everyone & performing & I wish I wasn’t feeling the way I do. To everyone who was coming to Wednesday’s show, I am so sorry. I am doing everything I can to be back on stage on Friday,” she added. The singer didn’t share any further details about her condition or health, but she was well enough to perform alongside Blake Shelton over the weekend at the California Mid-state Fair in Paso Robles, so the illness or discomfort presumably came on suddenly. Gwen’s residency began last year and is scheduled to run through late 2019.