Ashanti, Toni Braxton and Donny Osmond are among the stars who have reached out to Usher after his young stepson was declared brain dead by doctors following a jet-ski accident on Saturday (07Jul12).
Kyle Glover, the 11-year-old son of the singer's ex-wife Tameka Foster, was sitting on an inflatable raft which collided with the watercraft on Lake Lanier in Atlanta, Georgia.
He suffered head injuries and was taken to hospital in a critical condition but reports emerged suggesting Glover had shown no brain activity since the accident.
Usher and Foster have yet to comment, but the R&B star's showbiz friends have taken to Twitter.com to offer their support to the former couple.
In a post on her page, Braxton writes, "My heart and prayers go out to TamekaRaymond & usherRaymondIV during this extremely difficult time", while music mogul Russell Simmons adds, "My heartfelt prayers for Tameka and Usher. Can't even imagine..."
Ashanti states, "My heart goes out 2 (to) TamekaRaymond thru this indescribable time. Im praying 4 u (for you), Kyle, Ryan & ur (your) family may God bestow his Blessings upon u all", and Jada Pinkett Smith writes, "Yesterday was the day I find out that Usher and Tameka were dealing with the tragedy of their son. Our prayers are yours. Be strong."
Osmond writes, "My prayers go out to Usher and his family. His stepson was declared brain dead after a jet ski accident. Please pray 4 (for) them", and actress Tia Mowry adds: "My prayers go out to Usher and his family!"