Ariana Grande will begin the first of two sold-out concerts at AmericanAirlines Arena Friday night with a dare. The eye-catching choreography, whirl of wardrobe changes and thumping music that define the show to follow will be missing. So will its star. There will only be the voice.

The opening notes, sung over a darkened stage with Grande sequestered out of view, will not come from one of the Boca Raton native’s 25 Top 40 singles. Instead there will be “Raindrops,” the 30-second acapella opener from 2018’s “Sweetener” album, a poignant reworking of the Four Seasons’ “An Angel Cried,” gloriously free of layers of modern pop production.

Grande’s homecoming follows the release of two critically praised No. 1 albums in less than a year, “Sweetener” and “Thank U, Next,” accompanied by a sold-out 53-city North American tour, with high-profile stops at Coachella and Lollapalooza in Chicago, marred only by an allergic reaction to tomatoes that forced the postponement this week of shows in Tampa and Orlando (reset for Nov. 24 and 25, respectively).