LeAnn Rimes' Oklahoma concert on March 22 turned out to be pretty disappointing for her fans when the singer refrained from doing an encore after her "jaw has popped out."

The 31-year old singer later tweeted out an apology to her fans for bailing out, explaining reasons, "Oklahoma!!!! I love you so much! I'm sorry for no encore," the "Spitfire" songstress, 31, tweeted. "I had my jaw pop out of place & I can't hear out of my left ear. #tmjsucks," US Weekly reported.

Keeping her onstage injury problems at bay, LeAnn Rimes went on to further tweet, "I had the best time tonight with my Oklahoma fans! I love y'all!"

This is not the first time that LeAnn Rimes talks about her jaw popping out or TMJ (temporomandibular joint disorder) that causes pain and dysfunction in the jaw joint.

Back in 2012, LeAnn Rimes underwent several dental procedures for the condition and then tweeted, "Waiting on the endodontist to meet me and do a nighttime root canal."

LeAnn Rimes further added about her jaw popping out: "This is one of the craziest things I've ever been through. Trying to keep my mind off the pain & what's about to happen by saying hi to you guys. Life does not work on the right schedule sometimes. This is such bad timing! K, wish me luck. Much love!"

The next concert of LeAnn Rimes will be in Biloxi, MS at Hard Rock Live - Mississippi on Friday, April 4, 2014.

LeAnn Rimes' jaw popped out on Saturday but she still posed for the shutterbugs on Sunday at the baseball game of her husband Eddie Cibrian's kids.