blew viewers around the world away with her half-time performance at the Super Bowl XLIX which saw the New England Patriots win against the Seattle Seahawks.
She also welcomed Missy Elliot to the stage, joining her for a medley of Missy's greatest hits. Whilst the pop and rap superstars may be at opposite ends of the musical style spectrum, their hairstyles were much more alike. Both women wore long hair extensions which are known to cause hair loss.
It's understandable that the two female powerhouses would want a striking look for their prestigious half-time appearance, which was watched by an estimated 110 million people in the US alone, as well as being the most-watched Super Bowl ever in the UK. Whilst they do make an impact, their add-ins - long, sleek ombre hair extensions for Missy and a tight, high pony tail hair piece for Katy - can both cause the hair loss condition Traction Alopecia.
Traction Alopecia is also known as 'Ballerina Baldness' and is caused by too-tight hair styles, including buns, braids and any looks that involve the use of hair extensions or hairpieces. The constant pressure these styles cause to the scalp can damage hair follicles, causing hair to break, new hair growth to slow and, if left untreated, it can even cause baldness.
It has often been reported that Katy Perry has shown signs of thinning hair, particularly around her hairline, thought to be caused by her signature hairstyle - a high ponytail hairpiece which is affixed tightly to her crown - although she also has a family history of pattern hair loss.
Missy Elliot has spoken openly about her struggle with Graves' Disease, one of a number of illnesses that can cause hair loss. This auto-immune condition affects the thyroid and lists hair loss as one of its most visible signs, alongside weight loss.
As long as they are properly attached, occasional use of hair extensions, wigs or hairpieces for limited periods of time should not cause too much damage to your hair. However, repeated wear and poorly fitted extensions can bring on hair loss.
If you start to see signs that your extensions may be hurting your hair, stop using them immediately and contact a hair loss specialist. An expert can then diagnose your condition and prescribe an effective course of treatment for Traction Alopecia.
This often involves using high strength minoxidil to help trigger regrowth, which is a method that has provided promising results in a number of Belgravia clients, as can be witnessed in our Hair Loss Success Stories.
The Belgravia Centre is a world-renowned group of a hair loss clinic in Central London, UK. If you are worried about hair loss you can arrange a free consultation with a hair loss expert or complete our Online Consultation from anywhere in the world for home-use treatment.
View our Hair Loss Success Stories, which includes the world's largest gallery of hair growth photos and demonstrates the level of success that so many of Belgravia's patients achieve.