Since the news of the death of former South African president Nelson Mandela broke out, celebrities and fans from all over the world have been expressing their condolences on social media.

The hash tag "RIPNelsonMandela" has been trending on Twitter.

Jennifer Lopez: ""It always seems impossible until it's done." Rest in Peace Nelson Mandela. You will be missed. #trueinspiration #peoplewhochangetheworld"

Rihanna: "#NelsonMandela you made your people proud!! We'll always love you for it!"

Enrique Iglesias: "The world has lost someone truly inspiring. Rest in peace Nelson Mandela"

Mike Tyson: "I'm hearing about Nelson Mandela's death while on African soil in Oran, Algeria. Sending prayers to Mandela's family."

Tyra Banks: "He lives within us forever. We will never forget."

Ellen DeGeneres: "Today we lost the world's greatest advocate for peace and change. Nelson Mandela was a hero to so many. Rest in peace."

Eva Longoria: "Today the world lost one it's greatest leaders. Rest in peace Mandela..."

Jamie Foxx: "Rest in Peace Mr. Nelson Mandela. A fearless leader, incredible human being, inspiration, a REAL hero. Truly one of a kind. God bless you."

Samuel L. Jackson: "Never met a better person in my life than Nelson Mandela. My sympathy to his family & his country."

Mia Farrow: "Beloved Madiba you taught the world to walk from anger toward peace and understanding. No words can adequately express our gratitude. RIP"

Lindsay Lohan: ""A good head and a good heart are always a formidable combination." #RIPNelsonMandela"

Alyssa Milano: ""There is nothing like returning to a place that remains unchanged to find the ways in which you yourself have altered." ~Nelson Mandela"