Fallon, as always, was the ideal host making Jonas comfortable and welcome as he was put through the shredder.
Fallon revealed to the audience that Jonas was now an international model. Jonas is the new face of Guess underwear, having done a series of ads for the company.
The 25-year-old singer could hardly contain her excitement as she watched the old memories in a You Tube video posted Tuesday, revealing she and Joe even had their first kiss on camera.'How long did you guys date?
'It was my choice to break up but I love her as a friend. I will continue to be her friend and be there for her.' Meanwhile, Demi will be releasing her upcoming documentary, Simply Complicated, which follows her life.
Fallon, never one to lose an opportunity, dug out the video and played Joe Jonas’ “Single Ladies” clip.