So here's what we know. This week, painfully Lady Gaga canceled the rest of her tour dates due to a hip injury.

Lady Gaga postponed four dates on Tuesday after experiencing difficulties Monday during her concert in Montreal. The singer's show is high energy with non-stop dancing. She explained to fans on Twitter that she'd hurt herself while performing some time ago.

She wrote: "I hid it from my staff, I didn't want to disappoint my amazing fans. However after last nights performance I could not walk and still can't".

A news release announcing postponements Tuesday said the 26-year-old singer, whose real name is Stefani Germanotta, was suffering from synovitis, an inflammation of the joints. She underwent tests Wednesday morning that showed she had a labral tear in her right hip, however. The labrum is a layer of muscle that helps holds the ball-shaped hip joint in place. The news release says the surgery will require strict downtime.

Don't we hear more about hip injuries with someone way older?

Well, not necessarily. It can actually be something you can watch out for in your young athletes.

Shape Magazine writes and quotes Steven F. Harwin, M.D., chief of adult reconstruction and total joint replacement of the hip and knee at Beth Israel Medical Center in New York City.

While common in older people suffering from arthritis, young men and women are susceptible to this type of damage too, especially if they engage in high-level sports (up to 22 percent of athletes with groin pain have a labral tear, reports WebMD) and strenuous physical activities, Dr. Harwin warns. Perhaps all those crazy-intense dance sequences in sky-high heels finally caught up with Gaga, and hardcore training sessions for the tour surely hasn't helped.


Shape Magazine adds:

Recovery from this type of arthroscopic surgery—where a telescope is placed inside the hip along with small instruments to remove or repair the tear—is fairly quick, Dr. Harwin says. She may only need crutches for a few days, followed by a cane. Physical therapy will take the longest time, 12 weeks or more, so Gaga may be sidelined until early summer.