LeAnn Rimes didn't just sing her heart out Saturday in Oklahoma—she popped her "jaw out of place" mid-performance, too!
The 31-year-old singer took to Twitter to apologize for ending her concert somewhat abruptly. "I'm sorry for no encore," she wrote. "I had my jaw pop out of place & I can't hear out of my left ear. #tmjsucks."
TMJ, short for temporomandibular joint dysfunction, is used to describe pain and restricted movement of the jaw and its surrounding muscles. She explained to a fan on Twitter Saturday she's "had it [TMJ] since I was 16."