Question: What  is a song recorded by Barbadian singer Rihanna, American musician Kanye West and English musician/former Beatles member Paul McCartney, that was followed by  a trap song and represents a notable musical departure from the previous single?
Sentence (from "FourFiveSeconds"): Previewed by West at the iHeartMedia Music Summit on January 21, 2015, it was posted on Rihanna's official website on January 24.
Relevant evidence: No