AIMH

AIMH, or Always In My Heart is the name for the second most retweeted tweet in the world.
At this point in time it has 2.3 million retweets.
Coming in first is Ellen DeGeneres' tweet from the Oscars.
This tweet currently sits at 3.3 million retweets.

But number 2 is the infamous Always In My Heart tweet:

This tweet has never been taken down and is used as a significant piece of evidence pointed at Larry. On Valentine's day 2016 American/British time, the AIMH tweet reached 2 million retweets. And yes that is 2 million separate twitter accounts hitting retweet on this love declaration.

Not only that but it was tweeted the day before Louis started his pr stunt with Eleanor. So he was basically telling the world, more specifically Harry, that no matter what he is forced to do that Harry would be the only one in his heart. Which is very cute.