The singer's father also is named in the lawsuit filed by Brand Sense Partners, which brokered the 2004 deal for the singer's "Curious" perfume.
The issue is that Spears negotiated a new deal with Elizabeth Arden for a perfume called "Radiance" last year. The lawsuit claims that agreement directly violates the original deal.
In the filing, Brand Sense Partners says it is entitled to a 35 percent commission on the new deal.
Spears has not commented.