With all the 'dos Rihanna has sported over the years, her hair has been put under immense pressure.
And as she stepped out in New York yesterday, her hair was showing signs of strain, as she displayed a thinning patch above her forehead.
Her dark tresses are courtesy of a weave, the track of which could be seen behind her natural hairline.
The luscious locks stood in contrast to the wispiness of her own hair, which looked weak after years of constantly changing her barnet.
Balding due to the use of weaves or extensions (medically known as traction alopecia) is pretty common, and other celebs who have experienced bald patches include Katie Price and TOWIE's Jess Wright.
Since hitting the big time back in 2005, Rihanna has sported blonde, red, black and brown hues, including tumbling curls, a sleek bob and a short undercut do.
For all of her hairstyles over the years, flick through our gallery of her best looks.