Curious (Hayley Kiyoko song)

"Curious" is a song by American singer-songwriter Hayley Kiyoko, from her debut studio album Expectations (2018). It was released as the album's third single on January 11, 2018 by Empire/Atlantic Records. Kiyoko co-wrote "Curious" with Lisa Vitale, Brandon Colbein, Jakob Hazell and Svante Halldin, while Jack & Coke (Halldin and Hazell) produced the song. The dance-pop, R&B and synth-pop track details Kiyoko confronting an ex-girlfriend she believes is dating a man to mask her true feelings for Kiyoko. Its title adopts "curious", a term used within the LGBT community to express casual same-sex experimentation, as Kiyoko demands the truth about the authenticity of her love interest's new relationship.

Kiyoko wrote the track based on a past relationship with a closeted woman, as well as various romantic experiences with women who were unsure about their sexuality, hoping the song would encourage open dialogue among queer individuals. "Curious" has earned acclaim from music critics, who praised its production, subversive themes and Kiyoko's confident delivery, often deeming it one of Expectations' strongest tracks; some media publications have ranked the single among the best of 2018. Despite limited radio airplay, "Curious" peaked at number 40 on Billboard's US Mainstream Top 40 chart.

A music video for "Curious" was released the same day as the single, which Kiyoko co-directed with James Larese. Actress Tereza Kacerova co-stars as Kiyoko's former love interest, who she encounters at a house party Kacerova's character is attending with her new boyfriend (Henry Zaga). Critics praised the video's visuals, choreography and Kiyoko's direction, as well as its sensual depiction of a lesbian relationship. Kiyoko has performed "Curious" live several times, including on Jimmy Kimmel Live!, at the 2018 MTV Video Music Awards and during her Expectations Tour. Kiyoko also performed "Curious" with singer Taylor Swift during the latter's Reputation Stadium Tour (2018).