The answer is A LOT!

In support of the Supreme Court decision to legalize gay marriage in all 50 states, Facebook released a tool that encouraged people express solidarity with a rainbow profile picture. The social media giant reports around 26 million users used the tool. How did they figure that out? Duh, they're tracking you. Nothing new.

According to Gizmodo.com, a Facebook spokesperson 'didn’t deny that the social network was tracking which users support gay marriage and adding that to the database of personal information the company has on its billion users.'

Before you get you get too hot and bothered, Facebook added 'This was not an experiment or test, but rather something that enables people to show their support of the LGBTQ community on Facebook. We aren’t going to use this as a way to target ads and the point of this tool is not to get information about people.'

ListenFirst found the most popular hashtags over the weekend were #LoveWins with 11.3 million posts, followed by #Pride with 511-thousand posts.