Bobby Brown and members of Whitney Houston's family have been singing the late superstar's hits as they stage a bedside vigil for the former couple's troubled only child, Bobbi Kristina.

The 21 year old was hospitalised in Georgia over the weekend (31Jan15) after her partner Nick Gordon found her unresponsive and face down in a bathtub at their Roswell home.

She has since been moved to a top medical centre in Atlanta, where family members have told the media she is "fighting for her life".

Now it has emerged her father and members of her close family have been taking it in shifts to sit with Bobbi Kristina and sing her mother's songs.

A relative tells People.com, "We'll sing Jesus Loves Me, Amazing Grace, but also some of Whitney's songs. We've been singing Greatest Love of All. Bobby has sung that to her too."

Bobbi Kristina's condition remains critical and family members admit they are "praying for a miracle".

Bobby Brown has released a new statement, in which he reiterates his request for privacy: "Please allow for our family to deal with this matter and give Bobbi Kristina the love and support she needs at this time."