Listen to Lady Gaga on iHeartRadio

Lady Gaga's "ARTPOP Ball" tour is taking a brief break.  The pop star is postponing two dates on her North American tour this week, in Seattle and Vancouver. 

Gaga has tweeted that she's come down with a case of "horrible bronchitis," and that she's "devastated" to have to cancel the dates, which were scheduled for Wednesday and Friday night.  She adds that "Ursala took [her] mermaid voice," and promises to reschedule. 

Concert promoters Live Nation have yet to confirm any new dates.  The tour is expected to continue on in the North America through the beginning of August. 

Gaga was forced to scrap remaining dates on her "Born This Way Ball" tour last year after a hip injury required her to undergo surgery. 

Photo Credit Getty Images