Denny worked with his cousin, Nate Fischer, to pull the whole thing off, and they did an amazing job! After taking Halsey out to dinner, Denny walked with her to Veteran's Plaza, where the dance group Urban artistry just happened (wink, wink) to be having a performance. Upon their arrival, Urban Artistry called Denny and Halsey to join them. They blasted the song "Marry Me" by Jason Derulo and circled the couple with their amazing dance moves.
Once the song was over, Denny got down on one knee and... well, I'll let the pictures do the talking!