The `Hero` singer - who is married to rapper-and-presenter Nick Cannon - reportedly owes just under $30,000 in unpaid bills for Dr. Cindy Bressler`s services for her pets.
The veterinarian filed claims in a New York court on 23.06.10, alleging the pop star has paid just $8,200 towards the $37,800 worth of charges for "extraordinary services" given to her three dogs, JJ, Cha Cha and Dolomite in one month.
The filing states Cindy tended to the pets "at the special instance and request" of Mariah between October 31 and December 2 2009.
It added: "She rendered veterinary services including extraordinary services to the defendant`s canines. Dr. Bressler performed work, labour and services on the defendant`s canines... at the agreed price and reasonable value of $37,790.32, which sum Mariah agreed to pay."
If Cindy`s claim is successful Mariah will also have to pay her legal costs making the final total sum higher.
Cindy`s attorney told gossip website TMZ the vet was in charge of feeding and grooming the pooches while Mariah was away in Los Angeles.
A spokesperson for 41-year-old Mariah said her legal team were not aware of the lawsuit.