It's been 21 years since the death of Tupac Shakur, and fans across social media have been paying tribute to the artist throughout the day to honor his legacy.

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On Sept. 7, 1996, the rapper was gunned down in Las Vegas while en route to a nightclub after watching a Mike Tyson versus Bruce Seldon fight. He died nearly a week later at age 25 after his mother, Afeni Shakur, removed him from life support. His murder remains unsolved.

More than two decades after his death, hip-hop heads still sing his praises, heralding him as one of the greatest musicians in history. Never afraid to tackle controversial topics that spanned from politics and social activism, Tupac influenced the masses through his film, poetry and music.

Today, people are expressing their gratitude. From lyrics and quotes to pictures and newspaper clippings, many have flocked to Twitter to remember the fallen star using the #TupacShakur hashtag.

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