Kendrick Lamar has always made his admiration for Tupac Shakur known.

In fact, he was initially going to title his To Pimp A Butterfly album Tu Pimp A Caterpillar. (Which would be abbreviated as TUPAC.)

Pac died 19 years ago to the day in Las Vegas, and there's a special message from K.Dot on Tupac's offical website:

What does Tupac mean to you?