Also in existence are claims that deaths were covered up. Such theories include the "Paul is dead" claim alleging that Paul McCartney died in a car accident in 1966 and was replaced by a look-alike Scottish orphan named William Shears Cambell who also went by Billy Shears, and that The Beatles left clues in their songs, most noticeably "Revolution 9", "Strawberry Fields Forever", "Glass Onion", and "I Am the Walrus", as well on the covers of "Abbey Road", "Sgt. Pepper's Lonely Hearts Club Band", and "Magical Mystery Tour". Another is the conspiracy theory, widely circulated in Nigeria, which alleges that Nigerian president Muhammadu Buhari died in 2017 and was replaced by a look-alike Sudanese impostor. Many fans of punk-pop star Avril Lavigne claim that she died at the height of her fame and was replaced by a look-alike named Melissa. The Melania Trump replacement theory proposes the same of the former U.S. First Lady.