Every time the paparazzi catch them unexpectedly we can't tear our eyes away - but it's not necessarily the celebrities we're looking at.
Instead it's the trendy phone accessories they clutch to that have caught our attention, and one particular fashionable brand seems to be spreading like fire.
Kendall Jenner, Cara Delevingne and Rihanna have repeatedly been spotted carrying the cow skin case by ullu, a Dubai-based company that custom-makes accessories for Apple Watches, iPads and iPhones.
Founder Vikramaditya Jain hails from India where the products are made, but runs the business in the UAE, where it's easier to ship all over the world.
He claims the stars are never paid to rock the accessories, they simply love the cases which also come in alligator and stingray.
The premium leather products are available in a range of colors, designs and finishes which have been repeatedly worn by the likes of Kate Hudson, Kourtney Kardashian, Ashley Benson, Vanessa Hudgens, Jenna Dewan Tatum and January Jones.
You can order at ullu online or buy in Dubai's Mall Of The Emirates. Check out the gallery to see who else is a fan.