Kid Cudi also made a cameo appearance next to Solange in the video for the song "T.O.N.Y." in February 2009, and later in the Black Eyed Peas' video for "I Gotta Feeling", with David Guetta. He has also been on two magazine covers, Complex Magazine (August/September 2009) and URB Magazine (August 2009). Bape awarded Cudi his own t-shirt in September 2009, in reward for his music and past employment their when living in New York City.
Cudi's debut album Man on the Moon: The End of Day was released on Universal Motown Records on September 15, 2009 and sold 104,419 copies in the first week and charted at #4. The album's first single was Day 'N' Nite, and is Kid Cudi's greatest commercial success thus far, the song charting well both in the USA and in Europe. The next single was "Make Her Say" (originally titled "I Poke Her Face"), which features a sample from Lady Gaga's song "Poker Face" and performances by Kanye West and Common.
On February 25, 2009, Cudi self-leaked a "teaser trailer" for the upcoming Transformers: Revenge of the Fallen film using his song "Sky Might Fall" in the background, later he posted that he made the trailer himself and now was in talks to possibly make it official.
With Emile, Cudi produced an exclusive single called "Switchin Lanes" for the video game Midnight Club: Los Angeles, part of its "South Central Premium Upgrade" Downloadable Content (DLC) which came out March 19, 2009 for the PlayStation 3 and March 27, 2009 for the Xbox 360.
He revealed information about his future project via his blog, saying that another solo album was planned for release after the collaboration with Chip Tha Ripper and will be followed with a collaboration project with electrorock duo Ratatat Cudi joined rapper Asher Roth for the Great Hangover concert tour during the summer of 2009. Kid Cudi featured on the highly anticipated Jay-Z album The Blueprint 3, on the song "Already Home". On Myspace "Music Feed", Kid Cudi has confirmed that he is already starting on a new album.