Sydney Quiseng

Sydney Sierota, known professionally as Sydney Quiseng since beginning her solo career in 2024, was born on April 21, 1997, in Los Angeles County, California. She married Cameron Quiseng on March 30, 2019, and they have one child, Jane Carole Quiseng. Her musical journey began at a young age, leading her to become the lead singer and keyboardist of the American alternative pop band Echosmith, which she formed with her siblings. During her time with Echosmith, Quiseng achieved significant milestones, including the release of the triple-platinum hit “Cool Kids” in 2014, and other notable songs like “Bright.” She also appeared in music videos for the band, such as “Echosmith: Cool Kids” (2014), “Echosmith: Get Into My Car” (2017), “Echosmith: Scared to Be Alone” (2020), and “Echosmith: Lonely Generation” (2020).

In 2024, Sydney Quiseng embarked on a solo career, adopting her married name for her professional endeavors. This new chapter allowed her to explore country and Americana genres, focusing on deeply personal storytelling in her music. She released her debut solo EP, “Phases,” in June 2025, followed by another EP, “That’s My Baby!,” in February 2026. These projects have featured collaborations with artists like Tyler Braden and Yam Haus. Her solo work has garnered attention, with songs being spotlighted on Spotify’s All New Country and Apple Music’s New in Country playlists. Quiseng also signed a worldwide publishing deal with BMG in June 2025, further solidifying her presence as a songwriter. She has also performed at events such as CMA Fest at Gibson Garage and PBR Cowboy Bar.

Throughout her career, Quiseng has also contributed to soundtracks and appeared on various television shows. She was a performer on “Secret of the Wings” (2012) and contributed as a writer to “Endless Love” (2014) with the song “Surround You.” Her work with Echosmith also led to appearances and song features on “The Ellen DeGeneres Show” (2014), “Today” (2014), “Conan” (2014), “The Tonight Show Starring Jimmy Fallon” (2014-2015), “Live with Kelly and Mark” (2015), “Late Night with Seth Meyers” (2015), and an uncredited writer role for “Cool Kids” on “Glee” (2015). She also performed in “Linkin Park and Friends: Celebrate Life in Honor of Chester Bennington” (2017). Her consistent engagement in music has established her as a recognized artist and songwriter.