From WENN.com

The pair was getting ready for an event to promote its latest film, about a woman with a mysterious past who falls for a widower, when Duhamel took a tumble and burned his hand.

He tells People magazine, ""I tripped over Julianne's curling iron cord and grabbed the wrong end of it. So I had to do the rest of our press day with Band-Aids all over my fingers. We put them under ice, but, yeah, they're a little blistered. It's not too bad.""