Variety reports: “At this year’s Cannes Film Festival, heads will turn at a new May-December romance: TikTok, which is 6 years old, has hooked up with the venerable fest, now celebrating its 75th anniversary. How is it that Cannes — which, in years past, notoriously banned social-media posting from its famous red-carpeted steps — is now welcoming TikTok as one of its elite sponsors?”