Taylor Swift to Headline Amazon Prime Day Concert Special Prior to Amazon's two-day summer sales event br on July 15 and 16, the retail giant will host the br first-ever Prime Day Concert on July 10. Taylor Swift is set to headline. Dua Lipa, SZA and br Becky G will also perform. Jane Lynch will host. Steve Boom, VP of Amazon Music Steve Boom, VP of Amazon Music. Prime members can livestream the concert which starts at 9 p.m.