Friends of country singer Faith Hill are reportedly concerned that she may be undergoing treatment for throat cancer.
Hill, 49, recently canceled a concert that was scheduled for Aug. 3, and a source told Radar Online that the singer's close friends are worried that she may be keeping the gravity of her condition a secret.
In a statement issued Aug. 2, a representative for Hill said she had been "put on two days of vocal rest."
"Under doctor's advisement, Faith Hill has been put on two days of vocal rest and unfortunately, the Soul2Soul show in North Little Rock, AR at the Verizon Arena tomorrow is being cancelled," the statement read, according to Country Fancast . "Tim and Faith adore their fans and are so sorry to disappoint them."
Hill's husband and fellow country singer Tim McGraw is reportedly "terrified" that the problem may be serious.
"Tim is beside himself," a source told Radar Online. "Both he and Faith are concerned that if her condition gets any worse, her golden voice will be silenced for good."
Dr. Stuart Fischer, an internist from New York, explained that "throat cancer does affect the vocal cords early on in the disease."
"That's the only way you might detect it, as you can't really feel the larynx, since there aren’t really any nerves there," he said. "Someone like Faith Hill would no doubt see a throat specialist to have this checked out."
Dr. Fischer added: "If it's not cancer, she could develop throat polyps, which can rupture, and really are a singer's worst fear. Faith needs to take it easy."
A few days before the cancellation, Hill and her husband performed in Sacramento, California. Judging by the reactions on social media, the singer was in fine form.
"Concerts like this are what I live for," one concert-goer wrote on Twitter, according to The Sacramento Bee.
"Good lord, [Faith Hill] still has it," another fan tweeted. "The look, the voice. Does she even age?!"
Hill has won five Grammy awards throughout her career, according to Grammy.com. Her first three all came in 2000, when she won Best Country Album ("Breathe"), Best Female Country Vocal Performance ("Breathe") and Best Country Collaboration with Vocals ("Let's Make Love"). The latter award was shared with McGraw.
She also won Best Female Country Vocal Performance in 2002 for her song "Cry," and Best Country Collaboration with Vocals -- again with McGraw -- in 2005 for her song "Like We Never Loved At All."
Sources: Radar Online, Country Fancast, The Sacramento Bee, Grammy.com / Featured Image: Disney | ABC Television Group/Flickr / Embedded Images: Airman 1st Class Jason Neal/U.S. Air Force via Wikimedia Commons, sisterphotography/Flickr