Sara watched a lot of movies whilst writing for Hearthrob, and found herself influenced by their soundtracks, especially the music used for the 2011 crime drama film Drive. Tegan told the Toronto Sun: "She talked a lot about how film was really influencing her, how music is used in film to exaggerate certain emotional moments. I had challenged her to write more songs like (2007 single) 'Back In Your Head.' Like, 'Write a f---ing pop song, already! Carry your g-ddamn weight in this band, write another hit!' She wrote 'Shock To Your System' from the perspective of you telling her to get it together about love or life."
Until December 5, 1998, a song had to be issued as a single to make the Hot 100. Aaliyah's "Try Again" was the first tune to top the chart based on airplay alone, without any sales figures being included.