Whitney Houston was ''vibrant'' and ''crazy'' according to her Grammy Award-winning gospel singer friend BeBe Winans.

In 'The Whitney I Knew', published later this month, the 49-year-old friend relives some of their moments together.

Whitney Houston's friend is writing a book about her.

Gospel singer BeBe Winans - who performed at the 'I Will Always Love You' hitmaker's funeral in February - will release 'The Whitney I Knew' on July 31, with the tome including never-previously seen photographs of the pop superstar.