Late rapper Tupac Shakur used to be the right-hand man of assassinated US president Abraham Lincoln, a famous medium claims.

World-renowned psychic Victoria Bullis has contacted Shakur from beyond the grave for a piece in the new issue of US men's magazine Stuff and her findings are surprising.

As part of Bullis' chat with Shakur, the rapper tells her he was a white general during the American Civil War (1861-1865).

The medium insists Shakur knows who his killer was: "When you pass to the next life you see the whole thing."