Here are some old and rare pictures of Kevin, some of which I hadn't seen before.
This one is from the days when he was a dancer for LFO on Britney's tour in 2000, he mentioned having blue hair in an interview with Deatails in 2005:
Details: Britney, do you remember meeting Kevin back on that first tour?
Kevin: I had to pull out an old picture to show her what I looked like.
Britney: He had blue hair.
Kevin: Bluish-green. I also had a jail-style weed-leaf tattoo on my arm.
With previous girlfriend Amy in 2000.
All pictures from extremembritneypics.com