The 33-year-old "Think Like a Man" star took to Instagram to share a picture of the ailing star, reported Aceshowbiz.
"I pray a prayer for this precious young woman. I urge everyone who has a kind heart to please join in with us with prayers lifted up."
Meagan said she believed in the power of prayer and prayed for a miracle.
"I believe that prayer changes things. He already knows the desires of our heart, so He wouldn't have us do it if it didn't make a difference if aligned with His will.
Bobbi Kristina was rushed to hospital back in January after being found unresponsive in a bathtub at her Atlanta house.
In March, she was transferred to an Atlanta rehab centre before she was moved to the hospice care last month.
