Gwen Stefani didn't hold back during a performance of her new song, "Used To Love You," on The Voice Monday night.
The 46-year-old was visibly emotional as she sang the lyrics, "now look at what you lost" and "I don't know why I used to love you."
The track was released after Gwen and her husband of nearly 13 years, Gavin Rossdale, announced their separation in August.
(Photo Credit: NBC)
The mother-of-three looked truly angelic in a white gown as the crowd intently listened to the heartbreaking tune during the show's live playoffs.
Gwen and Gavin reportedly called things off after the blonde beauty found out about the rocker's alleged three-year affair with their children's nanny, Mindy Mann.
Gavin, Gwen and the nanny before the split. (Photo Credit: Splash)
Another nanny is said to have discovered explicit texts and nude photos of Mann on the family's iPad, which was linked to Gavin's phone.
“[It] completely devastated her,” a source said of the deception. “She was mortified, livid, and embarrassed. This was done right under Gwen’s nose."
Watch her performance of "Used To Love You" below: