Ray J got Soulja Boy a yellow McLaren, which goes for about 200K, for his 31st birthday.

Ray explained the gift in an interview with TMZ:

"He already got a lot of cars, but whatever I can do to help, whatever I can do to make the day go right."

SB drove the supercar to his big birthday party, which was broken up by the cops.

Even though the cops interrupted Soulja's good time, he didn't care.

"They're just doing their job," SB said.