According to In Touch, Stefani discovered text messages on Shelton's phone between him and his ex, Miranda Lambert, that "left her crushed."
According to a source, the dramatic incident happened backstage on the set of The Voice, where Stefani and Shelton are both judges. As the two were preparing for a show, Shelton left for a makeup touch-up and left his phone with Stefani, who then saw a text come through from Lambert, and later learned that Shelton has been texting his ex back.
"Gwen saw it and lost it. She found Blake and asked to speak to him privately, but he said he couldn’t right then and there," the insider shared. "She had tears running down her face and went and locked herself in her dressing room."
The source added, "Gwen has seen texts between Blake and Miranda. She’s really a mess over this."
It's not the first time text messages have caused a rift between Shelton and Stefani. On the night of the CMA Awards, Shelton reportedly left his phone with Stefani, and Lambert was texting him.
“Gwen saw it,” a source said then. “Miranda was trying to get Blake to go and see her and her friends at an after-party.”
An insider close to Shelton explained that that happened after Lambert asked Shelton “if they could sit by each other at the CMA Awards. But he declined and asked her to stop texting him.”
In Touch reports that multiple sources say Shelton is just being polite when he responds to Lambert's texts, and that he has no intention of getting back together with her.
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