American singer Rihanna faces a lawsuit as her former personal trainer alleges she owes her $26,000 in unpaid wages.

Fitness expert Cindy Percival filed a suit in Los Angeles County Superior Court Feb 26, which states the Umbrella hitmaker owes her payment for several weeks of intense training, reports tmz.com.

In the court papers, Percival claims she charged the star $1,500 a day for her services, and is still due to be paid $26,144.

The amount also includes $2,644 for travel expenses, which the trainer claims she spent while following the superstar around the world.