It's pretty fucking patronising & insulting that some seem to think she has no control over this...
She is in labour, of course she doesn't look impressed, but that doesn't mean that she isn't in agreement to what he is doing!
at him singing bloody Frozen while she's pushing yeah..so unreasonable when she asks him to stop & he does & apologises!! 
His PR are going to have to work overtime to turn this around. Turn what around, exactly?
It's like the part in Tim Minchin's show where a woman says that she wonders what it would be like to be his wife, being the subject of 'such a sexist song" (If I didn't have you)
He says "She (the woman) was a hypocrite & being sexist [herself] in making the rather condensing assumption that my wife, as a woman, couldn't handle that sort of humour & that she is a wilting flower"
Which is what most of you have done here...
Just because she is in labour, it doesn't mean that
1] he is exploiting or harming her
2] she isn't up for it