"There will be tears on the groom's side," Colton tells PEOPLE

By Eileen Finan
Updated January 07, 2016 12:15 PM
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Credit: Courtesy Annie Coggeshall

When American Idol alum Colton Dixon marries girlfriend Annie Coggeshall this weekend, the wedding will be fairy-tale inspired – but Prince Charming might have to pack some tissues.

“There will be tears on the groom’s side, probably as soon as she walks in the door. Maybe even before,” Dixon tells PEOPLE. “I can’t imagine how much of a mess I’m going to be!”

The singer, who placed seventh on the eleventh season of American Idol, was just as emotional after popping the question this September in Disney World when he hid the ring in Cinderella’s glass slipper for Coggeshall, 27, to find. “She said yes!!!!!! #disneyworld #bestdayever #icried #shedidnt,” Dixon, 24, captioned his Instagram photo collage.

The couple met through a mutual friend three and a half years ago at a show in L.A.’s Viper Room. After the wedding they’ll live together in Dixon’s home in Nashville.

Dixon, who released his second album of Christian music, Anchor, last year, admits to feeling a few jitters about their upcoming nuptials – which Coggeshall says will have a “royal” feel – but he says, “Honestly, as long as she says ‘I do,’ I’m good!”