Tupac Shakur has been dead for 15 years. The rapper died on Sept. 13, 1996 from internal bleeding caused by gunshot wounds.

Still, his influence lives on.

The most popular rappers today acknowledge the huge impact he had on the hip-hop and music industry.

Every rapper who grew up in the Nineties owes something to Tupac. People either try to emulate him in some way, or they go in a different direction because they didn't like what he did, wrote 50 Cent in a Rolling Stone piece.

His songs, meanwhile, are still widely played.

On YouTube alone, Tupac's videos - either originals or remixes released after his death - have generated at least 200 million views.

Of course, his content is also consumed through music downloads and on the radio.

Below are Tupac's five most popular videos on YouTube: