What song released to the radio by Republic Records on November 10, 2014 was the "Billboard" Hot 100 number-one hit?
Now That's What I Call Music! 54 (U.S. series):  It features 21 tracks including the "Billboard" Hot 100 number-one hit, "Blank Space" by Taylor Swift. Blank Space:  The song was released to the radio by Republic Records on November 10, 2014 as the album's second single, after "Shake It Off" and is the second track on the album.
Blank Space