The father-daughter duo was at the NBA Finals Monday night in San Fran, and fans couldn't help but compare her to her mom -- the 10-year-old is rocking a new curly-haired look that's definitely very familiar.

Blue's look feels similar to queen Bey in the mid-2000s, or as one fan reacted on social media ... "Beyonce really copy and pasted her looks on her." Not everyone sees the Beyonce comparisons, though ... some still see more of her dad than her mama.

Jay-Z even got the chance to embarrass her at the game in true dad fashion ... pulling her in for a hug while on camera, and she tried to break away as she whispered, "Dad, my hair."

BTW, last night's game 5 pulled Golden State ahead 3-2, and Jay and mini-Bey even got to chat it up with Steph Curry after the game.