![Sydney Sierota of Echosmith performs at the Billboard Hot 100 Music Festival in Jones Beach, New York on August 18, 2017 (Photo by Steven Ferdman/SIPA USA Stock Photo - Alamy Sydney Sierota of Echosmith performs at the Billboard Hot 100 Music Festival in Jones Beach, New York on August 18, 2017 (Photo by Steven Ferdman/SIPA USA Stock Photo - Alamy](https://c8.alamy.com/comp/2EW2D64/sydney-sierota-of-echosmith-performs-at-the-billboard-hot-100-music-festival-in-jones-beach-new-york-on-august-18-2017-photo-by-steven-ferdmansipa-usa-2EW2D64.jpg)
Sydney Sierota of Echosmith performs at the Billboard Hot 100 Music Festival in Jones Beach, New York on August 18, 2017 (Photo by Steven Ferdman/SIPA USA Stock Photo - Alamy
![Wantagh, NY, USA. 20th Aug, 2017. Sydney Sierota, Echosmith on stage for 2017 Hot 100 Music Festival - SUN, Northwell Health at Jones Beach Theater, Wantagh, NY August 20, 2017. Credit: Steven Wantagh, NY, USA. 20th Aug, 2017. Sydney Sierota, Echosmith on stage for 2017 Hot 100 Music Festival - SUN, Northwell Health at Jones Beach Theater, Wantagh, NY August 20, 2017. Credit: Steven](https://c8.alamy.com/comp/K06BTC/wantagh-ny-usa-20th-aug-2017-sydney-sierota-echosmith-on-stage-for-K06BTC.jpg)
Wantagh, NY, USA. 20th Aug, 2017. Sydney Sierota, Echosmith on stage for 2017 Hot 100 Music Festival - SUN, Northwell Health at Jones Beach Theater, Wantagh, NY August 20, 2017. Credit: Steven
World Music Awards - Happy Birthday Sydney Sierota! Sydney Grace Ann Sierota born April 21, 1997, is the lead vocalist of Echosmith, an American rock and indie pop band formed in February
![Sydney Sierota, Echosmith performing during Rock in Rio USA at MGM Resorts Festival Grounds in Las Vegas, USA Stock Photo - Alamy Sydney Sierota, Echosmith performing during Rock in Rio USA at MGM Resorts Festival Grounds in Las Vegas, USA Stock Photo - Alamy](https://c8.alamy.com/comp/2HY780D/sydney-sierota-echosmith-performing-during-rock-in-rio-usa-at-mgm-resorts-festival-grounds-in-las-vegas-usa-2HY780D.jpg)
Sydney Sierota, Echosmith performing during Rock in Rio USA at MGM Resorts Festival Grounds in Las Vegas, USA Stock Photo - Alamy
![Fifth Harmony's Ally Brooke & BFF Sydney Sierota Head to Coachella Together: Photo 1081291 | Ally Brooke, coachella, Echosmith, Fifth Harmony, Sydney Sierota Pictures | Just Jared Jr. Fifth Harmony's Ally Brooke & BFF Sydney Sierota Head to Coachella Together: Photo 1081291 | Ally Brooke, coachella, Echosmith, Fifth Harmony, Sydney Sierota Pictures | Just Jared Jr.](https://cdn.justjaredjr.com/wp-content/uploads/2017/04/ally-sydney/ally-brooke-sydney-sierota-coachella-together-03.jpg)