Here is the full exchange between Gaga & 1D. When they got up to collect their award, Gaga was watching + when the boo's started she looked like she couldn't believe it. The video cuts out right at the part where she gets up off her seat with richy & leaves (after talking about it with Will Smith). She heads backstage, knowing 1D would be there. And then... watch the video. Mother Teresa at her finest.
That's nice that she was affected by what happened to them. True class to go back there and wish them well. And she did it w/o knowing the cameras would be rolling.