Watch: Happy Birthday Katy Perry!: Live From E! Rewind
Now that's how you make an entrance.
Katy Perry showed off a bold hair transformation at the 2021 CMA Awards, dyeing her locks back to her signature color after spending years as a blonde. And she wasn't the only stars to change her tresses, as Kaia Gerber casually debuted bangs, Sofia Richie returned to her natural hair color and Dove Cameron said goodbye to her usually blonde strands in favor of a darker 'do.
Plus, Reign Disick once again played with his hairstyle and Billy Joel stepped out for the first time since losing 50 pounds.
Check out the most surprising celeb transformations of the week: