Jackie Evancho covered the song on her fourth studio album, Songs from the Silver Screen.
Aguilera has performed the track on four televised performances, including at the CBS This Morning show, which saw her gain the attention of songwriter Diane Warren.
Irving Tan from Sputnikmusic labeled "Reflection" a "decent" song.
In 2000, Aguilera recorded the Spanish version of "Reflection" titled "Mi Reflejo" which was adapted by Rudy Pérez for the album of the same name.
Beth Johnson of Entertainment Weekly noted Aguilera has a "who-am-I musings" persona in the song.