Rihanna cancels another tour date

Rihanna is really under the weather.

After launching her Diamonds World Tour on Friday in Buffalo, a case of the flu and laryngitis forced her to cancel her Sunday show in Boston.

And she postponed her Baltimore show Tuesday night, too.

Live Nation said in a statement that "Rihanna is still recovering," reports AP.

The concert promoter said fans "are instructed to retain their tickets pending rescheduling show date information."

Next stop: Thursday in Philadelphia.