Transcript for Lady Gaga Suffers 'Show Injury,' Postpones Tour
Reporter: This morning, pop superstar lady gaga, who burst to the music scene in 2008, with her hit "just dance," is finding herself unable to do just that. Overnight, the 26-year-old songstress announced she has been diagnosed with an inflammation of the joints. Her staff tweeting, gaga's doctor has ordered her to postpone shows in chicago, detroit and hamilton. It's an inflammation of the membrane that lines a joint capsule. And can cause significant plain. Significant swelling. Reduced range of motion. Reporter: The pop icon, known for her high-octane music videos, avant-garde wardrobe, and even more elaborate and physically demanding stage shows. But since april, she's kept a schedule that's been even too much for her. Crisscrossing the globe on her born this way ball tour. Performing a staggering 90 concerts in over 40 countries. Overnight, the singer said it was this show in montreal monday, seen in a video posted on youtube, that was the straw that broke the camel's back. I hid it from my staff. I didn't want to disappoint my amazing fans. However, after last night's performance, I could not walk and still can't. The first course of action is rest. And then, some medications to reduce the inflammation. Reporter: And while the grammy award-winning singer tells fans she's hoping for a speedy recovery, and appears to still be planning to take to the stage next tuesday in philadelphia, many wonder if her grueling tour pace may finally be catching up with the paparazzi diva. Lady gaga will not go on unless she will a jaw-dropping performance. To have to postpone four shows, you know she's not doing well. She is a true athlete. We're wishing you the best, gaga. Get well soon.
This transcript has been automatically generated and may not be 100% accurate.