The former American Idol star's illness has forced her to pull out of opening for Sugarland tonight (August 3) in Cincinnati, Ohio and on Saturday (August 4) in Clarkson, MI.
Alaina said that she is "so sad" to miss Sugarland's weekend concerts, but is focused on recovering.
"My doctor is putting me on vocal rest. I'm really sorry to disappoint the fans who were coming to see me and my friends Sugarland, who have helped me out on their tour," she said. "I will make it up to you and be back soon."
Alaina will be replaced for the gigs by former Ally McBeal star Vonda Shepard.
The 'Georgia Peaches' singer is next scheduled to perform in Bowmanville, Canada on August 12. It is not yet known if that concert will be affected by Alaina's vocal problems.
Watch Lauren Alaina's 'Georgia Peaches' music video below: