Ready to hear the sweet sounds of an Ed Sheeran "Thinking Out Loud"/Sam Smith "I'm Not the Only One" mashup? Well, feast your eyes (and ears) on the magical stylings of Sam Tsui and Casey Breves, who have arranged the songs into the most beautiful collaboration ever.

While we're already obsessed with the pairing of the tracks -- especially because Sam Smith and Ed Sheeran are British besties and have already performed together -- we love it even more because it's brought to us, in part, by Sam Tsui, who also bestowed upon us this insanely epic Taylor Swift mashup. YAASSS.

As the two guys sit in a room illuminated by white lights (let's be real -- it's the perfect setting for a performance of these songs), Sam (Tsui, that is) takes over "Thinking Out Loud" while Casey is in charge of "I'm Not the Only One." Of course, the two vocalists manage to blend the ballads flawlessly, creating a seamless, emotional tune filled with both happiness and heartbreak. And did we mention that the guys sound legitimately unbelievable? Seriously, their vocals will send you straight into swoon city, population: PopCrush (and anyone else who has watched the video). For realises.

Check out Sam Tsui and Casey Breves' Ed Sheeran/Sam Smith mashup in the video above. Trust us: You'll be seriously glad you did!

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