Pop singer Jewel broke her collarbone and a rib on Wednesday after being thrown from a horse at the Texas ranch of her boyfriend, rodeo star Ty Murray. Although the 27-year-old was not hospitalized, she will have to wear a collar and a sling for about a month. A European tour that was slated to kick off on May 10 in Italy is in doubt, but she's expected to proceed with her U.S. tour, scheduled to begin June 14 in Tampa.