Former world leader and pop star go Instagram official

Plus: Smart Fridge sends woman into psychosis.

Greetings!

Here are the latest trending internet culture stories today:

• Katy Perry and Justin Trudeau went Instagram-official after months of speculation and repeated sightings together.

• This dystopian tale of an advertisement on a Samsung smart fridge sending a woman into psychosis is almost too on the nose.

• The internet is pleased that a marathon jigsaw p…