The singer was hospitalized on Monday for exhaustion and jet lag, according to CNN, and will remain there for treatment.
He was taken to a Las Vegas hospital after being discovered "extremely disoriented" and couldn't get out of bed.
Ray J arrived in Las Vegas over the weekend to host a Prince Reigns Hair Serum event at the Rio Hotel & Casino and to attend the 2012 Billboard Awards. He had just returned from a quick 32-hour trip to China where "he performed a concert and had meetings regarding a new business." Immediately after landing, he drove four hours to Las Vegas.
There's no word on when he will be released.
Get well soon, Ray J.