Watch Ingrid Michaelson Perform Taylor Swift's 'Clean' at Women in Music Event

 Diane Bondareff/Invision Exclusively for Billboard
Taylor Swift and Ingrid Michaelson just off-stage at the 2014 Billboard Women in Music Awards on Friday, Dec. 12.

Before Taylor Swift accepted her Billboard Woman on the Year honor, she had a different honor to watch: Her friend Ingrid Michaelson performing Swift's 1989 song "Clean."