Singer Taylor Swift performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer Taylor Swift performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer Taylor Swift performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer SZA performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer Becky G performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer Becky G performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer Becky G, center, performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer SZA performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)Singer SZA performs at Amazon Music's Prime Day concert at the Hammerstein Ballroom on Wednesday, July 10, 2019, in New York. (Photo by Evan Agostini/Invision/AP)