Lady Gaga Hospitalized For Altitude Sickness In Denver

Lady Gaga was hospitalized in Denver after a bout of altitude sickness, but no need to worry: Mother Monster was feeling well enough to snap a selfie while wearing an oxygen mask.

Gaga shared a photo of herself to Instagram from her hospital bed, wearing full make-up while sporting the breathing apparatus.

"Altitude Sickness is no Joke!" the pop star wrote on Instagram. "#hitThatHospitalS--t #artRaveDenver many true ravers crowd tonight."

Gaga isn't the first artist to be hit with sickness while out on the road.

Paul McCartney, Morrissey and Miley Cyrus also have suffered from illnesses of late, causing performance cancellations and postponements.

Gaga is expected to rejoin her ARTPOP Ball tour this weekend. She is set to perform at the Rogers Arena in Vancouver, British Columbia on Saturday.

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