Gwen Stefani's concert tour might be struggling, but her boyfriend Blake Shelton is still her biggest fan — and he's going to propose to prove it!

Sources reveal exclusively to Life & Style that Gwen, 46, is already telling friends that she's expecting an engagement ring from the 40-year-old country singer at Christmastime.

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"Her ego has taken a huge hit because this tour has been tough,” says a source. “She can’t wait until she can focus more on Blake and their wedding.”

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And her three kids, Kingston, 10, Zuma, 7 and two-year-old Apollo, with ex Gavin Rossdale will definitely be involved in the winter proposal.

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"Gwen will have the boys for Christmas this year, and she very much wants them to be involved,” the source adds. “After all, Blake is going to be their stepfather.”

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For Blake and Gwen's cutest couple moments, check out the gallery below!