Rascal Flatts let the Backstreet Boys lead their new collaborative version of "What Hurts the Most." The song from the ...

With Rascal Flatts and the Backstreet Boys finding fame during the 1990s, it seemed only fitting the groups would collaborate ...

Rascal Flatts has put a new spin on their country ballad, 'What Hurts The Most', with some help from the Backstreet Boys.

Rascal Flatts on Duetting What Hurts the Most With Backstreet Boys (Exclusive) Rascal Flatts chats with ET's Cassie DiLaura ...

The boy band joined Rascal Flatts to perform their newly-released single, a fresh rendition of the country group’s song “What Hurts the Most.” They followed that tune by Rascal Flatt’s ...

They kicked off the finale performance together with Rascal Flatts’ tune “What Hurts The Most” before launching into the band’s track “I Dare You.” The Backstreet Boys delivered a ...

My passions were always discouraged, which made adulthood look grimmer with each passing day. (Note: There are many reasons ...

The show ended with a Backstreet Boys and Rascal Flatts collaboration of “What Hurts the Most,” “I Dare You,” “Larger Than Life” and “Life Is a Highway,” Billboard reported.