Dan and Shay may not be brothers, but they look enough alike that even fans can have trouble telling them apart. In the video above, in which the duo performs an emo song they wrote just for fun, Dan is on the left, and Shay is on the right. At the moment, Dan has longer hair, although it’s tied back in a bun in the video.
They may not be actually siblings, but it’s clear that the bond between Dan and Shay is pretty intense. They’ve been together for a decade, and they’ve found enormous success by relying on one another as music partners and friends.
Source: https://www.distractify.com/p/who-are-dan-and-shay-married-to