And the singer was rocking his new hair on the blue carpet, showing off those green tips.
Though he isn't the only celeb going wild with bright hair colors this summer.
Earlier this month, Katy Perry was spotted out with lavender hair. Kate Bosworth made an appearance with some blue highlights, while Sienna Miller and Dianna Agron both went for some pink in their hair.
Is colorful hair the new trend this summer?
And what do U think of Adam's hair? Share your thoughts with us here!
[Image via Adriana M. Barraza/Nikki Nelson/WENN.]