I'm in Love with a Monster

"I'm in Love with a Monster" is a song recorded by the American girl group Fifth Harmony for the 2015 animated fantasy-comedy film, Hotel Transylvania 2. It was written by Harmony Samuels, Carmen Reece, Sarah Mancuso, Edgar Etienne, and Ericka Coulter with production handled by Samuels. It was released to digital retailers on August 14, 2015, through Epic Records and Syco Music and serviced to contemporary hit radio in the United States four days later on August 18. "I'm in Love with a Monster" is a pop song that blends elements of R&B, soul, and hip-hop with "jazzy" rhythms along with heavy and funky beats. Critics drew comparisons to the musical style of girl groups such as The Supremes.

Lyrically, the track is about someone who is in love with a mischievous person, using "monster" as hyperbole to describe their personality. The song failed to chart in domestic and international charts but did enter the Belgium charts, peaking at number 23. Its music video premiered at the Sony billboard in Times Square on August 27, 2015, and features the group dancing in front and inside a hotel with actors dressed as monsters, in reference to the song's addition to the movie. Each member played a character in this video. Live performances for this track included The Late Late Show, hosted by James Corden, and a special radio performance On Air with Ryan Seacrest.

The song was released to digital retailers as a single and was later featured on the Japanese deluxe edition of the group's debut studio album, Reflection.

An announcement of the artist involved in the track for Hotel Transylvania 2 was first made public by Lia Vollack, president of Worldwide Music for Sony Pictures Animation, on June 16, 2015. When making the announcement at the press release, Vollack commented that there were "few groups out there" that could match the "incredibly fun feel" and the "animated vision" that Genndy Tartakovsky brought to the movie and stated that Fifth Harmony "knocked it out of the park." According to Vollack, the track was exactly what "we were hoping for." A preview of "I'm in Love with a Monster" was featured in a trailer for the movie which was released on June 17, 2015. The song was released for digital download on August 14. and serviced to contemporary hit radio four days later on August 18.

"I'm in Love with a Monster" was written by Harmony Samuels, Carmen Reece, Sarah Mancuso, Edgar Etienne, and Ericka Coulter. Samuels also produced the track, as well as being responsible for trombones, drums, percussion, bass, and vocal production. When speaking on working with the group, Samuels, who previously worked on the Reflection track "Body Rock" stated that the girls knew how to "work among themselves" and made the production process "very easy". In other interviews, he called the group "mature" and that after several years recording music, they are "starting to explore their individualities", which was a goal of producing this track.

The music video debuted on New York City's Time Square Plaza on August 27, 2015. It later premiered on Vevo the same day. Members of the girl group each reprise the role of a different character, but a "fun, gothic style" and Halloween-themed decor is common throughout the video. In an exclusive behind the scenes interview with Entertainment Tonight, the group revealed that Camila played Margaret, Lauren played Scarlett, Dinah played Cathy, Normani played Suga and Ally played Mary Jane. Scenes from Hotel Transylvania 2 are spliced with scenes of Fifth Harmony exploring a haunted hotel accompanied by a variety of monsters.