Celebrity hairstylist Kieran McKenna reveals his favorite celebrity hair transformations

With professional glam squads on speed dial and thousands of dollars of high-end beauty products on-hand, it's hard to believe that Hollywood A-listers could ever have a bad hair day. No matter the red carpet appearance, stars like Kim Kardashian and Bella Hadid always seem picture-perfect -- there's not a hair out of place!

Sometimes, it's not so much about frizzy hair or split ends. Instead, what constitutes a good look extends far beyond the leave-in conditioner and into the world of color and cut. But, it's more complicated than that.

Celebrity hairstylist Kieran McKenna is taking us through some of the most dramatic celebrity hair transformations . From the runway to the red carpet, these celebs "glow-ups" have put one trend on our radar: graphic bobs.

Explained Kieran to AOL Lifestyle, "Khloe and Kim Kardashian are the most prominent celebs who reflect this trend, along with Bella Hadid, Margot Robbie and Jenna Dewan to name a few others who have embraced the new look." Scroll through above to see how these stars nailed this new trend!

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