Kristin Cavallari and Jay Cutler Call Off Engagement

After just 10 months together, Cavallari and Chicago Bears quarterback Jay Cutler have called off their engagement, a source confirms to PEOPLE. "She got dumped," says another source. "She's absolutely devastated. She can't believe this is happening." The couple, who were planning a spring wedding, became engaged in April, when Cutler popped the question in Mexico. They had been spending much of their time recently in Chicago, and Cavallari had planned to move there during the upcoming football season. "She was planning her dream wedding, the date was set, the location '" everything was set," the source says. "She's in shock that the dream wedding she was planning is going to end this way." Just a week ago, Cavallari Tweeted about her engagement party. "Thx to all my amazing friends for making my engagement party a blast last night!" she wrote. The couple had completed their wedding registry, and Cavallari was determined to be in great shape for the wedding. Saturday night Cavallari hit The Beverly, an L.A. lounge, and was spotted without her engagement ring. "She was hanging out at a table with Nicky Hilton and Alessandra Ambrosio," a source tells PEOPLE. "She was telling friends how they called off the engagement."