In real life, Justin is married to Swedish actress Emily Foxler -- and nearly 10 million people have watched him propose. Justin popped the question at Blu Jam Café in Sherman Oaks, Calif., which is where the couple had their first date, and made a 27-minute short film capturing the moment.
Justin pulled out all the stops for the video, which features boy bands, a car chase and a very touching moment when Justin visits the gravesite of Emily's deceased father to ask for her hand in marriage.
Seeing as how Justin pulled such a huge surprise for Emily, we gave Emily a chance to turn the tables, inviting her to crash Justin's interview on our set.
"He's the master of surprises," said Emily.
Watch the video to see Justin's priceless reaction when Emily unexpectedly walks out on the ET stage.