How celebrities can do a good job at delivering bad news.

"O Captain, my Captain. Who knows where that comes from? Anybody? Not a clue? It's from a poem by Walt Whitman about Mr. Abraham Lincoln. Now in this class you can either call me Mr. Keating, or if you're slightly more daring, "O Captain my Captain" - John Keating (Robin Williams) "Dead Poets Society"

Back in April 2012, late rap legend Tupac Shakur came alive once again to his fans. Friends and family of the beloved rapper arranged for a virtual version of Tupac to perform at the annual Coachella Music Festival in Indio, Calif. The performance went viral, capturing more than 15 million YouTube views within two weeks. Tupac album sales increased more than 500%, and his Greatest Hits album landed a spot on the Billboard 200 for the first time in 12 years. Tupac died in 1996.