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Rihanna has canceled more Last Girl On Earth shows after poor ticket sales in Denver and Indianapolis due to "scheduling conflicts."

The singer has also pulled back on scheduled shows for Phoenix, Dallas and Georgia.

Ticket sales are down in general for the year, which has led to a cancellation of several dates or tours altogether from major acts like Christina Aguilera and the Go-Go's due to the slow economy.

There are some shows that still draw a big crowd though. Coachella this year brought in $21.7 million for a single weekend, and Bon Jovi grossed a total $52.8 in their North American tour dates.