Kacey Musgraves Performs Encouraging Piano Ballad 'Rainbow' on 'Seth Meyers': Watch

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Country star Kacey Musgraves stopped by Late Night with Seth Meyers on Wednesday (June 20) to perform her new single "Rainbow" ahead opening for Harry Styles at New York City's Madison Square Garden.

Musgraves sang the hopeful track -- which appears on her critically acclaimed album Golden Hour -- joined by only a piano. Her clear voice dripped with sweetness, making for an intimate and honest performance.

Watch the full performance below.