R&B superstar Usher has had an up and down year filled with high’s and low’s. From the high’s of releasing a new album and killing it at the BET Awards to the low’s of going through a public divorce with his ex-wife Tameka Raymond and most recently a custody battle. Now the star has another tragedy to add to his list of low’s – his step-son was in a terrible jet ski accident and has been declared brain dead. 11 year-old Kyle Glover, the oldest son of Tameka Raymond has had no brain activity since being admitted to the hospital, and is currently on life support.  The boy sustained an injury to the head after being hit by a Jet Ski while in Lake Lanier over the weekend.  Glover was riding in an inner tube when he was hit by a jet ski. According to TMZ, Usher chartered a private jet for his ex-wife so that she could fly in from out-of-town to be with her son. Usher was also spotted at the hospital as well.