The 38-year-old rapper was passed the mic by singer Charlie Wilson, who was singing his tune "Outstanding" before breaking into Kanye's 'See Me Now' but the rapper could no longer remember the lyrics of the 2010 single, reported New York Post.
"Kanye said, 'I don't remember the words!'. So he started singing 50 Cent's 'In Da Club' instead. The whole crowd was chanting the song's lyrics, 'Go Shorty! It's your birthday'," a source said.