01/27/2007 AT 02:30 PM EST
Blues singer B.B. King has been released from the hospital, PEOPLE has confirmed.
The 81-year-old singer was admitted to the University of Texas Medical Branch at Galveston"] on Thursday because of fever and forced to cancel a performance that night.
"Mr. King left the building to board his bus at 1 p.m. CST," hospital spokesman John Coloen tells PEOPLE.
The legendary bluesman was hospitalized
in the acute care unit for the elderly. According to his management company, this was because of his advanced years.
"It was just the residue from a bout with the flu and it was low-grade fever," rep Tina France tells PEOPLE. "He was in the special unit simply as a precaution because of his age."
Paco Vargas, whose restaurant Rudy & Paco is one of the show's major sponsors, told the Houston Chronicle
the singer did not leave his tour bus all day Thursday.
About 6:30 p.m., Vargas was ready to dish up snapper and lump crab meat for the singer at his restaurant, right next door to the Grand Opera House where King was scheduled to perform Thursday night. But a member of King's entourage arrived and said the singer wasn't feeling well.
Two doctors – restaurant regulars who happened to be dining there at the time – went to the tour bus to examine King.
After a half hour examination, they recommended he cancel his Thursday evening performance and enter the hospital.
King – who in December was awarded the Presidential Medal of Freedom for his musical contributions – was forced to cancel a concert on Friday evening.
"He's now feeling fabulous and going back to work on Tuesday," says France. "He will be playing Bass Performance Hall in Forth Worth, Texas. The dates that he has missed have already been rescheduled for June."
"He's back to his regular self and cracking jokes," adds France.