Rihanna's rockin' body is headed to court.

The 22-year-old singer is being sued by her personal trainer, who claims the R&B star failed to pay up for several 2009 workouts, TMZ reports.

Trainer Cindy Percival filed the lawsuit last week in Los Angeles County Superior Court, claiming Rihanna still owes her more than $26,000 in unpaid wages for a couple of weeks of work together last fall.

In the suit, Percival claims she was hired to perform "exclusive personal training services" for Rihanna at a rate of $1,500 per day.

The celebrity fitness trainer is also seeking to recoup $2,644.14 in travel expenses. Percival contends she was required to travel throughout Europe to train the "Hard" singer.

Rihanna has yet to comment on the lawsuit.