Exclusive: add Mariah Carey’s name to the list of celebrities who will be attending Whitney Houston’s funeral tomorrow. She’s going with L.A. Reid. She will not perform, however. The performers include Stevie Wonder, Aretha Franklin, Bebe and Cece Winans, and possibly Alicia Keys. Speakers include Clive Davis, and oddly, Kevin Costner. Bobby Brown and his nephew and other members of the Brown family, plus all the Houstons, Drinkards, and Dionne Warwick’s family are expected. Mariah’s husband, Nick Cannon, will not be there. He has health problems and twins to watch. Whitney and Mariah were always pitted against each other in a kind of fake feud during their heyday. But they recorded a hit duet called “When You Believe.” http://www.youtube.com/watch?v=CxIN79n4jVo