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Mr. and Mrs. Haywood!

Wedding bells rang Saturday night for Lady Antebellum's Dave Haywood -- the musician and his fiancee Kelli Cashiola are now husband and wife! 

In December, Dave surprised Kelli with an elaborate proposal decorating her house as a winter wonderland while she was at work, and spelling out "Will you marry me?" in Christmas lights outdoors.

Dave is the last member of Lady Antebellum to wed. Hillary Scott just got married in January, and Charles Kelley tied the knot back in 2009.

A big confrogulations to Mr. and Mrs. Haywood!

Leave your best wishes for the happy couple below!