"Rock Star" is a
pop rock song that features "American sounding
guitar riffs". Cameron Adams of the
Herald Sun noted that it "channels" Wheatus' "
Teenage Dirtbag" (2000)
Avril Lavigne's "
Sk8er Boi" (2002). Jamie Horne of
The Border Mail described "Rock Star" as "super-likable". Scott Murphy of Smurphy Reviews refereed the song as having "Beautiful lyrical execution". A writer for
The Hot Hits wrote that the song "does not disappoint". "Rock Star" also contains an
allusion to
Local H's “
Eddie Vedder". Whereas Local H’s lyric reads, "If I was Eddie Vedder, would you like me any better?," Mastin’s song slightly alters it with the line, "If I was Eddie Vedder, I'd bet you'd like me better." "Rock Star" debuted at number 31 on the
ARIA Singles Chart dated 15 October 2012. The following week, it peaked at number 16. On the
New Zealand Singles Chart, the song debuted and peaked at number 14. "Rock Star" was certified platinum by the
Australian Recording Industry Association (ARIA), denoting sales of 70,000 copies. ==Music video==