Whitney Houston's daughter mourns mother on 20th birthday

Whitney Houston's daughter Bobbi Kristina Brown has paid tribute to her mother on her 20th birthday.

Brown reached the milestone on Monday, and she took to her page on image sharing website Instagram to remember the I Will Always Love You hitmaker.

She posted a photograph of herself smiling for the camera and added in a caption, "I pray I'm growing into the phenomenal woman you always knew I'd become mommy, I love you and miss you immensely and I always will.

"You are my heart. You are my life. You are my everything. You are my motivation. You are me. I am you. We are one. Forever and always. I love you my lady."

Houston drowned in the bathtub of her Los Angeles hotel suite in February last year.