Gwen Stefani has reportedly called off her June 2018 wedding to Blake Shelton after planning for the past several months to marry her boyfriend of over two years. 

According to a new report, singers Stefani and Shelton were planning to say "I do" with an over-the-top wedding this summer, but now Stefani has allegedly halted plans on their ceremony after beginning to panic about her boyfriend's alleged cheating.

"She started panicking about all the details - and about her future with Blake," a source explained to Life & Style magazine on Jan. 14. "Gwen and Blake had a massive fight and Gwen called off the wedding."

As fans will recall, Stefani's first marriage to Gavin Rossdale allegedly ended after Stefani learned that the Bush frontman had cheated on her for three years with their young nanny, Mindy Mann. Rossdale was even believed to be sleeping with Mann during the time Stefani was expecting their third child, son Apollo, now 3.

Stefani also shares 11-year-old Kingston and 8-year-old Zuma with Rossdale.

According to an Us Weekly magazine report in Nov. 2015, one of Stefani's employees informed her of the alleged affair between Rossdale and Mann and she later saw intimate text messages sent between the two of them on her family's iPad. 

While there does not appear to be any real reason why Stefani would think that Shelton would actually cheat on her, rumors have been swirling that the Voice coach had gotten quite close to his winning contestant of Season 13, Chloe Kohanski.

"Gwen was really unnerved by the student-teacher relationship, especially when Chloe took home the title in late December," a source said in December.

According to the source, Stefani feels that she is more in love with Shelton than he is with her at this point in time and recently opened up to her boyfriend about her insecurities, telling Shelton that she could not handle another heart-wrenching divorce.

While Stefani has allegedly called off her June 2018 wedding to Shelton, the source went on to reveal that most of her friends still believe that she and Shelton will one day make it down the aisle. That said, the couple has some things to work on before they say "I do."

"Trust is important and this isn't the right time for a dream wedding," the insider added.

Tags: Gwen Stefani Blake Shelton