"All About That Bass" is the debut single by American recording artist Meghan Trainor. It was released by Epic Records in June 2014 and was co-written by Meghan Trainor and Kevin Kadish. The song was positively received by critics who praised the catchy beat, lyrics, and message. The song has become a commercial success, peaking at number one on the Billboard Top 100 and becoming her first hit single on the chart.
According to Trainor, the title of the song relates the idea of the bass being the support at the bottom of a song to a person's bottom: "You know how the bass guitar in a song is like its 'thickness," the "bottom"? I kind of related a body to that. My producer (Kadish) had the title and said that none of his prior co-writers could figure out what to relate that to. So, I said, "What about a booty? Let's talk about that!" From there, it turned into, let's do a song about loving your body … and your booty."
The song depicts the "ideal" skinny body type as overrated and promotes body acceptance by celebrating men and women of all sizes and shapes with lyrics such as "Every inch of you is perfect from the bottom to the top" and “It's pretty clear I ain't no size 2, but I can shake it, shake it like I'm supposed to do". Trainor says, "I wrote this song because I myself struggle with this concept of self-acceptance. It was written from a real place so I’m glad that other people can relate to it."
The song was originally passed down to various artists such as Beyoncé and Adele, but per the request of Kadish, Trainor sang the final version.