It was date night for Justin Timberlake, who hit up the Memphis Grizzlies game on Sunday. But JT wasn't out with pregnant wife Jessica Biel (who's rumored to be pregnant); he was chillin' with his grandmother in the stands.

"NBD. Just flexin' real hard at this @memgrizz game with my Granny," the former NSYNC member Instagrammed. "She must be good luck... We won by 16. #GoGrizz #GoGranny."

Timberlake is a minority owner of the Grizzlies, who won 103-87 against the Miami Heat.

When The 20/20 Experience singer wasn't hanging out with his grandma, he was courtside, filming the game.

Hey, if you were a partial owner of an NBA team, you'd bee soaking everything in, too!