Pop star Rihanna was partying like a boss in Miami at the famous strip club King of Diamonds. According to witnesses, Rihanna stopped in at…

TMZ has obtained a copy of a legal document that Joe Jackson has sent to Dr. Conrad Murray -- a prerequisite to filing a wrongful death lawsuit ... in which Joe claims Dr. Murray had been drinking at a strip club hours before he allegedly administered a fatal dose of Propofol to Michael Jackson.