Katharine McPhee and David Foster have been entertaining their fans with daily concerts through Instagram Live during the coronavirus outbreak, and Wednesday's live stream featured an impromptu haircut.After their first song of the evening, McPhee, 36, stood by her 70-year-old husband and revealed that she has cut his hair before the concert.She even tried to snip off a few hairs for the live audience, with her husband revealing his wife did a 'great job.' Haircut:Katharine McPhee and David Foster have been entertaining their fans with daily concerts through Instagram Live during the coronavirus outbreak, and Wednesday's live stream featured an impromptu haircut Snip:She even tried to snip off a few hairs for the live audience, with her.