The song was written by Lavigne, David Hodges, Chad Kroeger, Jacob Kasher, and its producer Martin Johnson.

Music critics provided mixed reviews to "Here's to Never Growing Up" and drew comparisons between it and songs by Katy Perry, Kesha, and Taylor Swift.

Due to the song's success, Lavigne performed "Here's To Never Growing Up" on a number of shows, including Dancing with the Stars, Today and The Voice UK.

"Here's To Never Growing Up" was written by Lavigne, David Hodges, Chad Kroeger, Jacob Kasher, and producer of the song Martin Johnson.

[2] Talking about the song's conception to 4Music, Lavigne revealed that she missed her high school prom so much, and that was the reason why she wrote "Here's To Never Growing Up".

[1][13] Digital Spy editor Robert Cospey wrote the song has a "pumping guitars 'n drums melody".

[8] Melinda Newman from HitFix thought that "Here's to Never Growing Up" is a "throwback" to Kesha's "Tik Tok" (2009) and Lavigne's "Girlfriend" (2007) for the same musical structure.

[8] In the song, Lavigne sings about the things she's going to do that she believes will keep her forever young, such as getting drunk and dancing on a bar, running down the street screaming profanities, blasting music and staying up all night.

Digital Spy critic Robert Cospey gave the song a three stars out of five rating, writing "The result is nothing she hasn't given us before, but there's no harm in having one last hurrah".

[8] Melinda Newman of HitFix provided a mixed review, writing that "You may find yourself begrudgingly clapping your hands and swaying to the generic "Here’s To Never Growing Up", but you won't like yourself for doing so.

[9] Entertainment Weekly's Kyle Anderson deemed "Here's To Never Growing Up" "a classic drinking tune" and compared the song's theme to Kesha's "Die Young" and Pink's "Raise Your Glass".

[14] A reviewer from The Huffington Post also thought that the track was similar to works by Kesha and Taylor Swift, calling it "a bouncy anthem".

[17][18] Four months after its release, the song received a RIAA Platinum certification in the United States with 1 million digital paid copies sold.