It was written by Isaac Hasson, Lindy Robbins and Mher Filian and produced by SuperSpy, for Lovato's second studio album of the same name.

The song received positive reviews from critics, who praised its pop hook and made comparisons to works of Kelly Clarkson.

"Here We Go Again" peaked at number 15 on the Billboard Hot 100 and became Lovato's first top 40 hit on the chart as a solo artist.

[3] Unlike Don't Forget, Lovato did not collaborate with the Jonas Brothers for her second album as she wanted to see what her sound would be like without their input.

[16] The song's lyrics chronicle the protagonist's on-off relationship with an indecisive boy as she sings that "Something about you is so addictive".

The Arizona Republic's Ed Masley referred it to as "an explosion of pop hooks delivered with a winning blend of heartache and bravado".

[13] Kerri Mason of Billboard called the song a potential hit single and noted that Lovato "almost sounds like Kelly Clarkson's kid sister".

[14] Margaret Wappler of Los Angeles Times compared it to Clarkson's "Since U Been Gone" and wrote that Lovato "tells a guy where to stick it over buff guitar lines".

[10] Chicago Tribune's Althea Legaspi referred it to as "anthemic" and "catchy",[18] while Houston Chronicle critic Joey Guerra described it was not as "immediate a grabber" as Lovato's previous singles.

[22] The song became Lovato's highest-peaking solo single on the chart until "Skyscraper", peaked at number 10 in July 2011.

The boyfriend is shown visiting the concert and after Lovato finished the performance, she returns to her dressing room.

To promote the album, she appeared on The Tonight Show with Conan O'Brien to perform the song on July 17, 2009.