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Katy Perry added the green hue after her latest split from John Mayer.
"I've wanted to go slime green for a long time," she told E! in March. "It's springtime, and I think it's time to freshen up my look," she said.
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"I'm really excited about slime green, but I hope my hair doesn't fall out."
Sadly it looks like green is on the way out, judging from this greenish-brown style she rocked earlier this month in London.
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She does go back to the bright green during her shows.
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And rainbow strands.
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But she's really known for her jet-black hair.
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Even though she's naturally a blonde. Really!
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Other times, it's all about the "California Gurls" blue.
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Or the blue and purple.
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Even blue and black.
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We'd kill to have her pink style.
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Show us how you do that roll, Katy.
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Just whatever you do, don't stop giving us some major hue inspiration, Katy. We wouldn't know what to do next if it wasn't for you.
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Tell us: What's your favorite Katy Perry hair color?
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