David Gest on Whitney Houston: 'Bobby was Whitney's downfall'

US promoter, David Gest, talks about the funeral in New Jersey of his friend Whitney Houston, known as The Voice.

Mourners at the service also included Oprah Winfrey, Mariah Carey and her Bodyguard co-star Kevin Costner.

David Gest praised Whitney's singing talent and said Bobby Brown, her former husband, was her downfall.