Mackenzie Phillips ... Self 3 episodes, 2009-2010 Susan Boyle ... Self / ... 3 episodes, 2009-2010 Aretha Franklin ... Self - Guest 3 episodes, 2009-2010 Joe Jackson ... Self 3 episodes, 2009-2010 Mariah Carey ... Self - Guest 3 episodes, 2009 Sean 'Diddy' Combs...