Katy Perry keeping hair black in mourning for tour end

Katy Perry went to the premiere of her concert movie Katy Perry: Prismatic World Tour with raven locks and said she wouldn't be changing it anytime soon.
"It's black [because] I'm in mourning because this tour is almost finished," Perry told E! She also is a bit worn out from the tour to worry about her hair color. "I think it's time for me to have a nap, a little sleeping beauty for a second."
Perry's ever-changing hair color has included purple, green and blue.
Perry said the tour has been "kicking her butt" all over the world for almost a year.
Her Prismatic tour ends in Bangkok on May 14 and she will take the summer off before hitting the road again in September.