United Kingdom, Jan. 28 -- Ray J says his heart is "only beating 25 percent" after he "almost died" in hospital.

The 45-year-old singer has given fans an update on his health after he was hospitalised in Las Vegas for a severe case of pneumonia earlier this month, having experienced heart pains.

In a recent Instagram video, he said: "My heart's only beating 25 percent, but as long as I stay focused and stay on the right path, everything will be all right.

"My health is not OK, so I thank everybody for supporting and praying for me through everything I've been in the hospital."

Ray - who has daughter Melody, seven, and son Epik, five, with his estranged wife Princess Love - captioned the post: "Just almost died!! I'm alive because of y...