She was hoping to rock out for her Dutch fans in Amsterdam this Friday (May 2) but instead Miley Cyrus will be trying to get healthy again.

According to an insider, the “Party in the USA” songstress “has had a health setback and her allergic reaction issues have returned. Miley is very bummed about it.”

Therefore, Miley will postpone her gig in the Netherlands and may also push back the May 4th concert in Antwerp, Belgium.

While lamenting her health woes, Cyrus posted a photo to her Instagram account while wearing a duck-themed oxygen mask. She captioned the shot, "This hospitals full of a bunch of QUACKS (get it??? Quacks)