Hillary Clinton has told how she was "stunned and thrilled" to receive Adele's backing to be the next US president.
Although she is unable to vote in the looming election herself, the singer still had her say by urging fans to reject Donald Trump as she performed in Miami on Tuesday night.
"Don't vote for him that's what I'm saying," Adele told crowds who cheered in reply.
Mrs Clinton said she was "really grateful" to receive the British star's endorsement that came just hours after former Republican secretary of state Colin Powell backed her bid for the White House.
"I went to the Adele concert after we finished our day of campaigning in Florida, and I was stunned and thrilled because I'm a huge fan of hers and it meant a lot to me that she said something so positive," she told US radio station SiriusXM.
The hugely popular Oscar winner's words came as an early birthday present for the Democratic candidate, who turned 69 on Wednesday.
However her Republican rival was not so generous as he hit out after drawing criticism for attending the opening of his latest luxury hotel in Washington.
Mr Trump told ABC News: "I think it's so unfair because, you know, Hillary Clinton goes to see an Adele concert last night, and everybody says, oh, wasn't that nice, isn't that wonderful?
"She goes, she does one stop. She has no energy. She's got nothing going. She does one stop. And nobody complains about that. Nobody complains when she goes to an Adele concert all night long, while I'm making two speeches at rallies with, you know, massive crowds."
During campaigning to become the Republican candidate Mr Trump took a break to watch the Hello singer and used her hits Rolling In The Deep and Skyfall at his rallies.
But is seems the feeling was not mutual, as her spokesman pointed out she had not given permission for her music to be used for any political campaigning.