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After months of rumours, Senhit - the country's 2021 entry - confirmed that the multi-platinum artist will be joining her on stage to perform their track titled 'Adrenalina'.
It comes as a bit of a surprise, too, especially given the 41-year-old's megastar status - with top hits such as 'Right Round' with Ke$ha, 'Club Can't Handle Me' ft David Guetta, and 'Troublemaker' with Olly Murs.
During BBC Four's live coverage of the first semi-final of the season on Tuesday, Senhit confirmed the news that Flo Rida - real name Tramar Lacel Dillard - would be performing with her later in the week.
Speaking to the official Eurovision site on Tuesday, she said: "Actually, when I invited him to join me on the Eurovision stage back in March, the decision was made there with joy.
"It was not easy to predict the travelling restrictions, but there we go.
"I'm very happy to have him with me to perform Adrenalina, not only to Europe but to the whole world."
She later posted a photo with him on Instagram, sending the Eurovision world into a frenzy.
The pair now have their work cut out for them in order to qualify for the finals which take place this Saturday.
Flo Rida will be more than prepared, though, as he starred and rapped in San Marino's official Eurovision music video, which you watch below.
While having an American musician perform at Eurovision may seem unusual, the competition does not have nationality rules preventing people from representing countries other than their own.
Senhit herself was born in Italy, but represents San Marino.
The announcement follows in the footsteps of Portugal in 2017, with San Marino delegates seeking a special exception from the Eurovision organisers.
The Eurovision Song Contest airs on Saturday, 22 May at 8pm on BBC One.
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