Side Effects (The Chainsmokers song)

[4] "We felt it was time for a summer jam rooted in the sound we created when we first started making records," the Chainsmokers said in a press release.

The song features Emily Warren, whom Alex Pall called "one of [their] favorite human beings", is the duo's longtime collaborator.

It features a "slapping bassline and soft lead melody on the piano and drums" reminiscent of Bruno Mars, and sees the duo "take on a more club-ready sound than recent dance-pop hits" rather than "relying on the pop-perfect minimalism of past smashes".

"[10] The music video, directed by Matthew Dillon Cohen and shot at Shore Club South Beach hotel in Miami, was released on August 21, 2018.

[12] Mendes wrote on Instagram alongside a teaser image before the visual's release: "It would appear that dancing in other people's music videos has become one of my favorite pastimes.

[14] Disgruntled, she decides to make the most of her unfortunate situation, taking off her maid uniform and throws a solo pool party, as she dances around the hotel on her night shift.

The video then shifts to showing various events going on in different rooms in the hotel, with scenes featuring cameos by Pall, Taggart, and Warren.