Kanye West forgot the words to his own song 'See Me Now' at Kris Jenner's star-studded 60th birthday party. 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 - on which he performed with Beyonce - but he admitted he could no longer remember the lyrics of the 2010 single, and quickly improvised with one of his rival's tracks instead.A source said: ''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!' '' Kanye - whose wife Kim Kardashian West is expecting their second child - then led the guests at the bash at The Lot in West Hollywood in a rendition of Stevie Wonder's Happy Birthday.Later in the evening, birthday girl Kris - who turned 60 on November 5 - made a lengthy emotional speech. The source added to the New York Post newspaper's Page Six column: ''Kris made a toast and thanked everyone. She was very emotional and it seemed to go on forever, but Khloe grabbed the mic and screamed 'the speech is over!' ''As well as Kris' famous daughters - Kim, Khloe and Kourtney Kardashian and Kendall and Kylie Jenner - guests in attendance at Friday's 'Great Gatsby'-themed party included Boy George, Will Smith and wife Jada Pinkett Smith, Melanie Griffith, Chrissy Teigen and John Legend, Tommy Hilfiger, Kyle Richards and Lisa Rinna...