Katy Perry's Christmas tune reached the top of the the US Adult Contemporary chart. John Salangsang / Invision / AP File
Katy Perry's Christmas tune reached the top of the the US Adult Contemporary chart. John Salangsang / Invision / AP File
Katy Perry’s Christmas single is number one on the US charts
The pop star’s seasonal effort dislodged John Legend and Esperanza Spalding’s own Christmas tune from the top spot
