The Game -- I Dropped $400,000 On Lakers Floor Seats!

The celebrities are finally feelin' the Lakers again -- especially The Game who tells TMZ Sports he just dropped $400,000 on courtside seats!!!!

Game was leaving Playhouse nightclub in Hollywood this week when someone asked him to sign a basketball (he's a huge hoops fan).

But instead of inking his own name, Game signed the name of L.A.'s top draft pick -- saying, "I'm putting my money on D'Angelo Russell!"

He even added the number "5" -- and said that's what D.R.'s jersey should be.

As for the seats, Game says he believes in the team so strongly, he bought 4 courtside season tickets -- which sell for $2,500 a pop.