Music veterans, friends and family have paid tribute to Grammy Award winner Natalie Cole, celebrating the late singer's life at a star-studded funeral in Los Angeles.br Cole, the daughter of veteran performer Nat King Cole, died aged 65 on Dec. 31 of a rare lung disease that led to heart failure.br "As much as I stood in awe of her artistry which ran so deep, when I think of her today I realize that it's her friendship that I will miss the most," music producer David Foster said.br Cole's family last week said the singer had been diagnosed with idiopathic pulmonary arterial hypertension five years ago after a successful kidney transplant in 2009.