You can watch a clip below:
The video has been unearthed on YouTube from three years ago, and shows Ekin singing with another star, Seçil Gür.
Following the revelation, viewers are adamant that Ekin-Su must remain in the villa until the talent show, which has been a feature on the show for years and would give her a chance to show off her skills.
Every year, the islanders each put on their best performance, showcasing one of their talents before the others vote for a winner.
And fans are pretty blown away by Ekin-Su's range of talents, with the 27-year-old revealing she's also an actress in the outside world.
One person wrote: "Is there anything Ekin Su can’t do?"
While another said: "EKIN SU MULTI TALENTED QUEEN. SHE CAN DO EVERYTHING."
And a third added: "The fact that Ekin can sing. I NEED her to stay for the Talent show. We deserve a performance."
Meanwhile a fourth commented: "Ekin su can sing as well? she really is the it girl."
Ekin-Su is from Essex, but has had some fame in Turkey starring on a soap called Kuzey Yildizi.
People are already predicting big things for Ekin when she leaves the villa, with many viewers suggesting she could be on Eurovision next.
One wrote: "Ekin su for Eurovision 2023!"
While another said: "EKIN SU FOR EUROVISION. It’s what the world needs."
And a third added: "Ekin su at eurovision next year!!"
Elsewhere in Love Island, Sunday evening's episode saw the islanders welcome new boys and girls in both the main villa and Casa Amor.
But viewers were particularly shaken by one person in particular - Dami Hope, who is currently coupled up with Indiyah Pollock.
Despite most of the boys spending the evening before pining for the girls and looking through their camera roll of photos, the majority of them seemed open to getting to know the new girls who entered the main villa.
And in a preview for Monday (4 July) evening's episode, Summer can be seen leaning in to kiss Dami, while Andrew appears to go in for a kiss with Coco.
And viewers at home are gutted with Dami especially, with one person writing on Twitter: "I don't even want to THINK about Love Island right now, Dami got me pi**ed off and I haven't even seen the episode yet."
While another said: "Dami! Your a liar! An actress! And you should GETTHEF**KOUT."
You can read more on that here.
Love Island continues at 9pm on ITV2