The lawsuit accuses Love of owing Beau Monde International $181,286, TMZ.com said Friday.
According to court papers, Love stayed at the Beau Monde's Recovery Retreat near Anaheim, Calif., from Aug. 25, 2005, to Nov. 18, 2005. The suit claims that Love paid $10,000 after entering treatment there, but that was all the facility received.
A Los Angeles judge had ordered Love to undergo rehab treatment after violating her probation in connection with drug and assault pleas.
Representatives for Love did not comment.