Nervous System (EP)

Nervous System is the third extended play and major-label debut by American singer and songwriter Julia Michaels, released by Republic Records on July 28, 2017. Most of the tracks on the EP were composed by Michaels and her frequent writing partner, Justin Tranter, as well as the EP's producers, Benny Blanco, Stargate and Mattman & Robin, who produced the album alongside Michaels herself. Musically, it is a pop record and lyrically it explores a former romantic relationship of Michaels'.

The album's first single, "Issues", was released on January 13, 2017, and peaked at number 11 on the Billboard Hot 100, alongside charting within the top 10 on charts in Australia, Belgium, Denmark, Norway, and the United Kingdom. "Uh Huh", the second single from Nervous System, was released on June 2, 2017. "Worst in Me", the third and final single from the EP, was released on September 18, 2017.

Upon its release, the EP received mixed to positive reviews from music critics, who complimented the EP's sound but questioned its impact. Commercially, the EP peaked at number 48 on the Billboard 200 and topped the New Zealand Heatseekers Albums chart. The album was also certified Gold by Music Canada (MC). To promote the album, Michaels opened for fellow singer Shawn Mendes on his Illuminate World Tour, specifically on his Oceania leg.