It took me a while to find one, but I finally settled on this Hello Kitty tutorial by Kayla Shevonne
I used Wet n Wild Lavender as my base
Dots were added using Sinful Colors Fusion Neon
Hello Kitty's shape was painted on using Claire's white detail polish
The nose was Essence Wanna Be Your Sunshine, and the eyes and whiskers were It's So Easy black Stripe Rite polish.
The bow is from the Claire's Girly Fimo Wheel.