Seven months after Gwen Stefani and Blake Shelton first announced that they were dating, their relationship appears to have hit a major bump!

Life & Style has exclusively learned that while The Voice coaches may have once been planning a summer wedding, they're now closer to calling it quits.

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“They are out of the honeymoon phase,” an insider reveals. “They’re just very different people and it feels like the end of their relationship could be soon. They’re clearly on the rocks.”

gwen stefani blake shelton getty images

Part of the problem stems from geography. Blake's friends and family are still in Oklahoma, while Gwen has always considered herself a California girl through and through.

Not to mention, she has three very important reasons to stay on the west coast, and their names are Kingston, 10, Zuma, 7, and Apollo, 2.

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“Gwen can’t just jet off to be with Blake whenever," the insider adds. "They are no longer talking on the phone all day long, like they used to.”

For more on Gwen and Blake’s complicated romance, pick up the latest issue of Life & Style, on newsstands now!

las cover june 6/27