Poppe, a 20-year-old student from Clarksville, Iowa, is the first female to win "Idol" since Candice Glover in 2013, and only the third since Jordin Sparks topped the field in 2007.
Last night the trio of finalists put forth their last performances for the American Idol judges and armchair judges at home.
Poppe established herself as a contender from the moment she auditioned with a heartfelt rendition of "Rainbow Connection".
Venezuela accuses USA of sabotaging election with new sanctions
The humanitarian situation in Venezuela has become increasingly dire amid soaring inflation and shortages of food and medicine. Venezuela's Information Ministry, which handles media requests for the government, did not respond to a request for comment.
Bebe Rexha, who'll be joined by the three finalists to perform her hit "Meant to Be".
Harmon - who recently released his first album, You Got 'Em All - won Season 15 of American Idolin April 2016, with fellow contestant La'Porsha Renae coming in as the season's runner-up.
In entering Monday's grand finale, the finalists and previously eliminated contestants took to the stage to perform songs alongside all-stars, such as Nick Jonas and Patti LaBelle. She made it to the top 70 in this year's competition. Hutchinson sang "Don't Close Your Eyes" by Keith Whitley, which allowed him to give a more heartfelt and romantic performance than usual.
One of the night's biggest surprises came when Caleb announced that he and Maddie have been dating. Barrett also faced harsh criticism after performing her new single, "Rivers Deep". They joined forces on Perry's 2012 hit "Part of Me".
The top two, Hutchinson and Poppe, were revealed to be a couple during the show and are being sent on a dream vacation to a resort in Hawaii, courtesy of Disney.
The first half of Season 16's two-part finale featured Barrett discussing the challenge of being compared to Carrie Underwood, her self-proclaimed idol. Maddie burst into tears when Ryan called out her name as the victor.