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Kristin Cavallari Is 'Happiest She's Ever Been' With Younger BF Mark Estes! Aww!

Kristin Cavallari is living her best life right now! The 37-year-old reality star hard launched her relationship with 24-year-old social media personality

While fans may have strong opinions about the pace of this relationship AND the 13-year age gap between them, nothing anyone has to say will burst the Laguna Beach alum’s happy bubble! In fact, a source close to the 37-year-old reality star revealed to People on Friday that she is “the happiest she’s ever been” with her much younger boyfriend! No matter what’s going on in her life, the source pointed out that her three children — Camden, Jaxon, and Saylor — remain her top “priority”:

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