Dionne Warwick think she knows what killed
Whitney Houston.
"You know, in all honesty, I think she had a heart attack," she tells
Entertainment Tonight in an interview airing tonight. "That's what I think happened to her." When asked about possible drug use playing a role, Warwick added, "I don't know if it's that or not. I think her heart just gave out."
Dionne also said she had ...