B.B. King

King posted to his Facebook page on Tuesday, writing, "I want to thank everyone for their concern and good wishes. I'm feeling much better & am leaving the hospital today." Blues legend B.B. King was rushed to a Las Vegas hospital this past weekend ... we're told for a diabetes-related emergency.…

B.B. King is totally embarrassed by his subpar performance in St. Louis recently -- but his rep tells TMZ, he has a good excuse for sucking ... the blues legend was off his meds. King's April 4th performance at the Peabody Opera House was meandering and stilted, he chatted with the audience more…