Hailing from Oakville, Ontario, the duo met in 2019 at the town’s legendary Moonshine Café open mic, instantly sparking a creative partnership and onstage chemistry. They quickly began writing together, and in 2020 they started releasing music, which quickly gained them a Canada wide following.

In 2021, their momentum accelerated when they placed 2nd in Canada’s Walk of Fame Emerging Musician Program, followed by their acceptance into RBC x Music’s First Up Program in 2024. Over the next two years, they toured across Canada and released multiple singles, all while building a loyal audience online. Their unique blend of music and comedy has racked up over 95 million views on TikTok and Instagram, earning them more than 100,000 followers.

In October 2024, they reached a new milestone with the release of their debut album, JUST TRY—a testament to their creativity, chemistry, and commitment to making heartfelt, boundary-pushing music.

In 2025, they kept the momentum going—As they put the final touches on their second album, released two of their biggest singles, “Time Alone.” & “HONEY B”  They’ve also played more shows than ever , including standout performances on the Main Stage at the Sound of Music Festival in Burlington, Headlining the stage at the Christmas Market in the famous Distillery District of Toronto, playing in front of thousands, and a special show for Team Canada at the Canadian Olympic Committee’s Fan Fest. Then they closed out the year with their 2nd annual charity show Rock The Halls which became their biggest show ever where they raised over $12,000 and collected 350 lbs of non perishable foods for Daily Bread Food Bank.

YST is getting ready to release another single leading up to their next album drop in the Summer of 2026.

With heartfelt songwriting, fearless genre-blending, and undeniable chemistry, YASSiN & Sean Terrio continue to turn heads—and make hearts sing with their infectious music, and comedy.