It turns out Will Smith did get in a fight before becoming the Fresh Prince of Bel Air — only it wasn't little. It was with the IRS.

"Before I was in trouble with Uncle Phil, I was in trouble with Uncle Sam," Smith says, explaining the origins of the '90s NBC sitcom that made him a household name on a recent edition of his YouTube series "STORYTIME."

Smith rose to fame alongside Jeffrey Townes, aka DJ Jazzy Jeff, who plays Jazz on "The Fresh Prince," after the two released their hit "Parents Just Don't Understand" in 1988. The song earned them a Grammy and was featured on an album that went triple-platinum.

Suddenly in the spotlight, Smith splurged on cars, motorcycles and name brand clothing before realizing that his lifestyle wasn't sustainable, he recalls.

Then the duo released their next album, "And in This Corner," and it flopped: "It was a tragedy. It went, like, double-plastic."