Video Related To: Usher's stepson passes away after getting off life support

Usher's celebrity pals showed an outpour of support on Twitter following the singer's terrible tragedy this past weekend. The singer's 11-year-old stepson Kyle Glover has been declared brain dead after he and a 15-year-old gal pal were admitted to a hospital following a boating accident Friday, TMZ reports. The pair were floating on inner tubes in Georgia's Lake Lanier Friday when a Jet Ski struck the two youngsters. Glover, whose mother is Usher's ex-wife Tameka Foster, was reportedly struck in the head and was knocked unconscious, according to Department of Natural Resources Sergeant Mike Burgamy. The girl also suffered serious injuries. Both children were immediately air-lifted to Children's Healthcare at Egelston Hospital in Atlanta. "Everyone PLEASE pray for Usher and Tameka's son! This is the time they really need your prayers," singer Fantasia tweeted Saturday. "Praying that Usher and Tameka's son is ok..." Russell Simmons added. The cause of the horrific incident is still under investigation, which could take months to complete, according to TMZ. So far, officials have ruled out alcohol as a factor in the accident, but Robin Hill, a rep for the Department of Natural Resources (Wildlife Resources Division) tells the site that they will recreate the accident using special computer programs to determine the details. Based on the results, Usher could choose to press charges over the accident. TMZ reports that despite their ongoing bitter divorce battle, Usher hired a <b>...</b>