For a brief moment this year, Jacinda Ardern was everywhere again. The former New Zealand prime minister brought her star power to the Stephen Colbert show and The Oprah Podcast; she was honored at Sundance; celebrities posted selfies with her on Instagram.
You may never have heard of Aki and Koichi, but this sartorial couple in their 70s from California are a hit on social media. They are part of a wave of influencers who are going viral in their 50s, 60s and beyond.