Demi Lovato may have been dating noted that 70s playboy Wilmer Valderama, but he's gotta be nursing a broken heart after Demi accepted a proposal from a tiny tot at a concert in Moline, Illinois over the weekend.

According to the pint-sized paramour's mommy:

Grant just turned 5, so we took him to see his (and our) favorite artist, Demi Lovato...yet again! She pulled him up on stage and he proposed to her! They are now happily "engaged" & we are thrilled!

Demi later posted a photo of her engagement to her Instagram:

Check out the adorable video below: