Officials are currently investigating the cause of the horrific crash, which injured a 15-year-old girl, along with Kyle Glover, 11, son of Usher's wife, Tameka Foster.

Usher's celebrity pals showed an outpouring 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 airlifted 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 private jet to bring Foster to her injured son.

The former couple have two children together - Usher Raymond V, 4, and Naviyd, 3.

Read more: http://www.nydailynews.com/entertainment/gossip/usher-stepson-hospitalized-boating-accident-celebs-twitter-prayers-article-1.1110055#ixzz208mhwLsK

Lord, this did something to me. SMH.  It's tough to read about children involved in such tragedies.  It makes you think about your life and the many blessings you have received from GOD and also the young people that are close to you.  It also makes you think about the 'minor' things that didn't have to be blown up into something major for nothing.  Lord, please lay Your healing hands on Kyle and the 15-year-old girl that was also injured.  May you also provide overwhelming strength and comfort to Tameka Raymond, Kyle's Dad, and Usher at this time. Amen.

Prayers are definitely up for this family, and also the person who was on the jet ski at the time, as I truly believe it was an accident.  One can only imagine how he or she is feeling at this moment.

And to those who have been so NEGATIVE towards Tameka since the story broke, how could you be so mean and evil? I'm not perfect by ANY means, but come on now. This is her CHILD! Where do you find the room in your brain to even think about such harsh things to type and/or say?  This child is fighting for his life!  I wouldn't wish such a horrific tragedy on my worst enemy!  SMH, people are getting crazier and crazier by the SECONDS!

GOD bless that child.