Another source reported that Aguilera was "sobbing" during rehearsals and even had the audience in tears while rehearsing her emotional song.
Following her performance Wednesday evening, Josh Duhamel hopped onstage to present Aguilera with the "People's Voice" award. The blonde star admitted to crying "four times" during Tuesday's rehearsals.
"Thank you for giving me this form of expression and letting me use my voice," the "Your Body" singer said in her acceptance speech. "It means so much to me. When I sing I believe it truly is the only time I can truly be myself."
"I find a home in music and I hope others can find a home in music as well."