Ri might wanna think about returning those $5,000 boots.

Williams claims that while Rihanna has had hits around the world, her label Def Jam only views her as a "singles artist" and refuses to fund her videos since the albums themselves don't sell well.

Her manager Marc Jordan of Rebel One Management is forced to fund promotion for the songs by funnelling money out of Rihanna's endorsement deals with companies like Cover Girl, Nike and Samsung.

"Disturbia" and "Take A Bow," her two most recent #1 singles, allegedly cost Rihanna a total of $750,000 combined.

"I showed her all the paperwork and tried to explain to her the circumstances but she wouldn’t listen," says Williams. "She called me all sorts of horrible names and stormed off."

The irony is that Rihanna's megabucks non-beau Chris Brown wrote "Disturbia," and is thereby seeing all the money from the royalties.

Um, Rihanna, girl? You might wanna think about getting pregnant.