The Austin City Limits Music Festival 2014 started today. As most people already know ACL has grown the past years expanding to two weekends of music in the city of Austin, Texas. The first weekend started today with talented artists such as Sam Smith and Outkast in the lineup. It’s been a sold out music festival since both one-day and three-day wristbands went on sale for both weekends. It will definitely be the talk of the weekend for Texans, but when did music festivals get this popular?