Tupac Shakur would be celebrating his 40th birthday today had he still lived with us. The rap star was killed in 1994 but has since remain in the hearts of millions worldwide through his music. On such a day like this, conspiracy theories have yet again risen surrounding Tupac's death and who is truly responsible. A case that remains unsolved. However, I would like to put that behind at this moment and simply take the time to wish the rap legend a happy birthday by posting my favorite song, "Changes".