Echosmith is an American indie pop band formed in California in 2009. Vocalist Sydney Sierota is known for her unique vocal technique, which combines powerful belting and delicate falsetto with a distinct vibrato.

• To start learning to sing like Sydney, first, analyze your voice and find out your vocal range with Singing Carrots' Vocal Range Test.
• Once you know your range, you can start practicing with Echosmith's songs, such as "Cool Kids" and "Bright," which showcase both Sydney's belting and falsetto techniques.
• To achieve Sydney's signature belting, focus on breath support and resonance. Singing Carrots' Breath Support article and Resonance in Singing article can help you with these techniques.
• For falsetto, warm-up and practice with Singing Carrots' Pitch Training, which includes exercises for both range and agility.
• Additionally, Sydney's use of vibrato adds a unique touch to her vocals. Learn how to incorporate vibrato with Singing Carrots' Singing with Vibrato article.
• To sound more like Sydney, you can also work on improving your posture and achieving an open mouth and throat, which can aid in projection and tone quality. Check out Singing Carrots' How Posture Affects Your Singing article and Why to Open Mouth and Throat While Singing article for tips and exercises.
• In addition, Singing Carrots provides resources for finding songs that match your vocal range and style. Use their Song Search tool to find songs similar to Echosmith's style.
• Lastly, check out Singing Carrots' educational singing course, which covers singing theory and practical tips for beginners.

With Singing Carrots' helpful resources and Echosmith's unique vocal techniques as a guide, you can start learning to sing like Sydney Sierota and become a skilled indie pop vocalist in no time.