Now That's What I Call Music! 56, is the 56th edition of the "Now!" series in the United States, it features which song by Taylor Swift featuring Kendrick Lamar, from her fifth studio album "1989" (2014)?
Now That's What I Call Music! 56 (U.S. series):  It features 22 tracks including three "Billboard" Hot 100 number-one hits: "See You Again" by Wiz Khalifa featuring Charlie Puth, "Can't Feel My Face" by The Weeknd and "Bad Blood" by Taylor Swift featuring Kendrick Lamar. Bad Blood (Taylor Swift song): "Bad Blood" is a song by American singer-songwriter Taylor Swift, from her fifth studio album "1989" (2014).
Bad Blood