LSU Star Flau'Jae Johnson Raps In Front Of Fans After NCAA Title Win

LSU guard Flau'Jae Johnson went from scoring buckets to dropping bars after the Tigers' national championship win on Sunday ... leading the team's celebration by performing her very own rap song!!

TMZ Sports has learned ... the freshman baller took over the mic at the Westin Hotel conference room in Dallas after the Tigers whooped the Iowa Hawkeyes, 102-85 -- and it was a party for the ages.

You can see Johnson -- who scored 10 points in the championship game -- on stage with her teammates, reciting the lyrics to her "BIG 4" track that dropped just a few months ago.

"Are you gonna rap or be an athlete? If I’m still doing both why you asking me?" Johnson fittingly says in the song.

The 19-year-old also mentions her PUMA deal ... saying, "Do it, I run it up, feel like the renegade. I got a PUMA deal, I don't get into Js."

Johnson takes her rap career just as seriously as basketball ... in fact, the 4-star recruit out of Georgia announced her commitment to LSU with a song titled "All Falls Down," which features Lil' Boosie.

On top of that, she's also signed to Roc Nation!!

Her father, Jason Johnson -- AKA “Camoflauge” -- was also a rapper out of Georgia. He was killed before she was born.

When it comes to hoops, Johnson is a problem ... this season, she averaged 10 points, 5.9 rebounds, and 1.9 assists per game and was named the SEC Freshman of the Year.