I agree it's highly unlikely that H&M would agree to anything that hadn't been pre-approved, @JADS, but there's nothing to actually stop a journalist going off script and slipping in a "surprise"
This leaves the interviewee with the choice of thinking quickly on their feet (unlikely IMO with these two), refusing to answer, or even outright terminating the interview
Unfortunately only the first option could avoid them looking bad, and once that happens it's hard to come back from no matter what moaning's done afterwards