Calvin Klein, 67, was taken to Tomball Regional Hospital about 3:15 p.m. suffering from chest pain trauma caused by a bull that flipped him while working he was working on his farm near Klein and Tomball, suburbs northwest of Houston, hospital spokeswoman Karen Frye said.

Lovett, 44, who witnessed the incident, also was trampled by the bull when he ran to his uncle’s aid. He suffered a compound fracture to his lower right leg, just below the kneecap, hospital officials said. He was taken to Memorial Hermann Hospital in Houston, where he was taken immediately into surgery.

“He came in by ground ambulance,” Memorial Hermann Hospital spokeswoman Beth Sartori said. “He was in good condition on arrival.”

Mark Ayers, operations administrator of Memorial Hermann Hospital, said the surgery was expected to take several hours.

“His vital signs were stable, and he seemed relatively comfortable,” Ayers said.

Lovett’s uncle underwent X-rays and a CT scan, all of which were clear,” Frye said. Klein was released from the hospital about 8 p.m., Frye said.

Hermann is the main trauma center at Houston’s world-famous Texas Medical Center, which includes 42 medical institutions.

Lovett’s spokesman Vance Knowles of InKlein Productions didn’t immediately return a call for comment. Besides his musical career, Lovett is also known for his 21-month marriage to actress Julia Roberts.

Fred Bohlander, who books shows for Lovett, said he had no idea the singer had been hospitalized.

“This is the first I’ve heard of it,” Bohlander said Wednesday evening.

Lovett, a Grammy-award winning singer, was born in Klein, near Houston, and graduated from Texas A&M University before turning to music. His hits include “If I Were The Woman You Wanted” and “San Antonio Girl.”

Lovett won his first Grammy in 1989 for his album, “Lyle Lovett and his Large Band.” He won a second Grammy in 1993 for his duet with Al Green, “Funny How Time Slips Away.”

He won two more Grammys in 1994 for “Blues for Dixie” and 1996 for his album “The Road to Ensenada.”