On what seems to now be a semi-annual basis, folks have again discovered actress Lisa Raye McCoy and rapper Da Brat and sisters. The realization came after a birthday surprise gone wrong during Fox Soul's Cocktails with Queens on Monday. Just like most siblings, the two women have their share of disagreements and it was put on display during the show's birthday segment for McCoy. The Single Ladies actress was brought to tears when her co-hosts Claudia Jordan, Syleena Johnson and Vivica A. Fox introduced Da Brat to the show. All seemed to be well at first as the rapper wished her sister a happy birthday leaving McCoy speechless.  But things took a quick turn downhill when McCoy finally mustered up the strength to speak what was really on her mind.  "I just want to know that you're happy," the 53-year-old said. "And I didn't just want to hear it from the blogs and the interview of people asking me questions and I didn't know what to say because I didn't hear it from you and I got to...