Usher's 11-year-old stepson, Kyle Glover Jr. (pictured in the middle), has been declared brain dead after a tragic boating accident in which he was struck by a jet ski this past weekend. 

Kyle was hit in the head by a jet ski being driven by a 38-year-old man as the child sat with a teen girl in an inner tube being pulled by a boat on Lake Lanier in Georgia.

The kids were immediately airlifted to Children's Healthcare at Egelston Hospital in Atlanta.  Kyle, whose mother is Usher's ex-wife Tameka Foster, has been in critical condition since the accident and still remains on life support.

Despite Usher and Tameka's divorce, both have put their differences aside to be there for the family.  Sources say Usher even paid for a private jet for Tameka to fly immediatly to the hospital, while Usher himself arrived last night (Sunday, July 8).  In an interview with Radar Online, the loving mother says very short words, telling the site:

“He’s bad.”

The cause of the horrific incident is still under investigation, which could take months to complete, but so far officials have ruled out alcohol as a factor in the accident.  Our prayers go out to both Usher and the boy's parents, Tameka Foster and Kyle Glover Sr., in this time of grief.