R&B singer Brian McKnight became the latest celebrity on Donald Trump’s NBC distributed “Celebrity Apprentice” to get the boot Sunday. McKnight, in his eighth week, was fired after being paired with team members Melissa and Brande and reportedly ‘loosing his spirit’ and ‘desire’ to be on the show after a heated battle of words between Joan Rivers and several cast members. Rivers reportedly called Annie a “trouble maker” and a “snake” during the episode. The former “Anytime” singer’s firing follows that of TLC singer Tionne T-Boz Watkins dismissal last week for allegedly “volunteering for execution”. In related news, Brian McKnight is gearing up for the CW Plus distributed “The Brian McKnight Show,” slated to air this fall.