Rihanna may have to cancel some upcoming concerts because of low ticket sales. Rihanna has been advised by her manger to cancel her "Loud" tour.

The same thing happened last year with her "Last Girl On Earth' tour, she had to cancel dates in Phoenix, Dallas, Atlanta, Denver and Indianapolis due to poor sales.

A source told the New York Post:

"It has been a big disappointment," our source said. "The ticket sales in big US cities like Boston are so bad, they will barely cover basics like the lighting and other arena costs. Tour managers are begging local radio stations to do giveaways."

Industry insiders are saying the Rihanna isn't ready to headline an arena tour yet, she should be playing smaller theaters and smaller venues.

Rihanna is scheduled to play the Target Center June 16th, we'll see if she makes it or not.