Grammy-winning country music star LeAnn Rimes was treated at a Grand Junction, Colo., hospital a day after performing in the summer heat.

Rimes, 15, complained of "weakness" and spent about an hour in the St. Mary's Hospital emergency room Thursday night, hospital spokeswoman Christine Feller said.Rimes and fellow country star Bryan White, on their "Something to Talk About Tour," had performed outdoors Wednesday at the Greeley Independence Stampede. The high in Greeley on Wednesday was 90 degrees.

Rimes seemed fine after the concert, smiling and waving to fans as she boarded her tour bus. She arrived at the hospital late Thursday after making a six-hour trip west from Greeley to Grand Junction.

Her Thursday night show in Grand Junction was canceled.