"Wolves" is a song by American singer Selena Gomez and electronic dance music producer and DJ, Marshmello. It was written by Gomez, Ali Tamposi, Louis Bell, Brian Lee, Carl Rosen, Marshmello and Andrew Watt, with production handled by the latter two.

Commercially, the song has topped the charts in Hungary, Latvia, and Poland while reaching the top 10 in Australia, Austria, Belgium, Canada, the Czech Republic, Denmark, Finland, Ireland, Lebanon, Malaysia, the Netherlands, New Zealand, Norway, Portugal, Slovakia, Sweden, Switzerland. and the United Kingdom as well as the top 20 in Germany, Spain, and the United States.

Marshmello first revealed the collaboration on July 22, 2017, when he tweeted: "Happy birthday Selena Gomez! Can't wait for the world to hear what we've been working on." On August 15, 2017, Marshmello wrote that Gomez "sounds absolutely incredible" on the song, when replying to a fan who asked him to talk about the collaboration. During a radio interview with Tonya and Sonic on San Diego's Energy 103.7 FM, Gomez spoke of the collaboration: "It's really cool. It's kind of in that world, his world, and I'm stepping into it and bringing my style too." She called it a beautiful song as well as one of her favorites. On September 25, 2017, a follower of Gomez reached out to Marshemello via Twitter for a "tip" about the song, to which Marshmello replied: "Coming very very soon," leading to speculation on the song's release. On October 6, 2017, alongside the announcement of his single "You & Me" and collaborations with Migos, TM88 and Southside, he reassured fans that the song is "coming very soon". On October 19, 2017, both Gomez and Marshmello took to social media to officially announce their collaboration and its release date. Gomez shared pictures of her wearing a pink version of Marshmello's helmet while they sit on the ground and the two sitting on a couch eating popcorn. It was premiered via radio show Beats 1 where hoster Zane Lowe named it the release day's "World Record".

The song, written by Gomez and Marshmello along Ali Tamposi, Louis Bell, Brian Lee, Carl Rosen and the song's producers Marshmello and Andrew Watt has been described as a "sticky electronic snack" and "propulsive EDM" which is equally "acoustic-laced EDM and long, lost 80's pop". Caitlin Kelley from Billboard noted how Marshmello's influence in the song can be heard through "subtle trap elements, like the triple high hats buzzing beneath the smoky atmosphere." "Wolves" opens "dark and gloomy" with Gomez singing over a clean electric guitar as Kat Bein from Billboard commented, the build of the bridge is "almost country-pop, but the choral hook is all Marshmello sweetness." In an interview with Zane Lowe for Beats 1, Gomez stated that the lyrics deeply reflects what she was feeling the period she recorded the track.

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