How to Sing Like Lovelyz's Main Vocalist: Chest Support, Blending & the Technique Behind It

Singing like Lovelyz's main vocalist isn't about chasing a big high note — it's about holding a thick, steady low-to-mid tone and knowing how to pull your own voice back so it blends inside group harmony. Those two skills reflect the role she has held in Lovelyz as leader and main vocalist, anchoring the bottom of the group's harmony, and both are trainable regardless of your natural tone color.

Safety note: None of the techniques here should cause throat soreness, a pressed or squeezed feeling, or hoarseness lasting beyond 24 hours. A thick low-register tone comes from chest resonance and breath support, not from pushing with the throat. If it starts to feel effortful, reduce intensity. Consult an ENT specialist for hoarseness lasting more than two weeks.

Her Vocal Profile

Names first, since this is where searches often go wrong. Lovelyz's leader and main vocalist is Lee Su-jeong, and since 2021 her stage name has been her real name. From debut through 2021, she performed under the stage name Baby Soul — both names refer to the same person. Lovelyz also has a separate member named Ryu Su-jeong, so it's worth using the full name when searching to avoid mixing up the two.

Lovelyz did not disband. The 2021 contract expirations across the group were an indefinite hiatus, and the group was reactivated for its 10th anniversary in 2024. Lee Su-jeong was the last of the eight members to remain under the group's original agency, and her own contract ended in February 2025. As of July 2026, no new agency has been publicly announced.

Her position was leader and main vocalist. Early in Lovelyz's career she also handled lead vocal and some rap parts, then was promoted from lead vocal to main vocalist in 2017. As a soloist, she released the mini-album My Name in 2022 (title track "달을 걸어서"), writing lyrics for all six tracks herself, and held her first solo concert the same year.

No verified official vocal range figure could be found. The fan-reference sites typically cited for this kind of data are currently unreachable, so this guide doesn't assign any specific range figure. Instead, it works from the key and BPM of released songs — for example, "Bebe" sits at roughly B-flat and 100 BPM, and "Ah-Choo" at roughly F major and 127 BPM. Treat these as algorithmic approximations from song data, not measured physiological range.

Her vocal identity comes down to two things:

• Thick low-to-mid chest support — a chest-resonance-anchored tone that holds the bottom of the group's harmony.
• Harmony blending — the leader/main-vocalist skill of pulling back her own overtones to blend with other parts.

Her Signature Songs — by Vocal Challenge

There's no official part-breakdown documentation, so the table below is built from song key/BPM data and her confirmed position (leader, main vocalist), not from assumed part assignments. Transpose any of these to a key that fits your voice.

Start at the top and move down only once each technique is stable. "달을 걸어서" is the destination, not the starting line — with no group members to share the harmony, you have to carry lyrics you wrote yourself across the entire track alone.

The 3 Techniques Behind Her Sound

Thick Low-to-Mid Register Support

Her tone stays thick through the low-to-mid register instead of thinning out, which is a matter of resonance placement — keeping chest resonance active even at low pitches — rather than raw volume. In a slow, jazz-inflected track like "Bebe", losing this support shows up as wavering tone color and sagging pitch. The common mistake is dropping volume on a low note while leaving resonance placement unchanged, which thins the sound out. Bloom Vocal's Chest Resonance Activation (E-2), Appoggio Technique (A-10), and SLS Vowel Scale (C-8) exercises train this support.

Harmony Blending (the Leader/Main-Vocalist Role)

A leader or main vocalist is often the one holding a part low in the mix so it anchors the harmony rather than cutting through it. This isn't a weaker vocal — it's the deliberate skill of suppressing your own overtones so your voice blends with other parts. The common mistake is confusing blending with singing passively, which drops breath support along with tone: the goal is to pull the tone back while keeping the support underneath it intact. Bloom Vocal's Harmony Singing (B-12) and Mixed Resonance Blending (E-11) exercises train this balance. The mix voice practice guide covers more on controlling tone inside a blend.

Lyric-Driven Delivery (as a Songwriter)

Writing lyrics for every track on her solo EP is a sign that her vocal approach is rooted in the lyrics as much as the melody. In an emotionally direct ballad like "That day", the priority is articulating consonants clearly enough to carry the words, then mapping the emotional arc to how those words unfold. The common mistake is letting consonants blur while reaching for emotion, which costs intelligibility. Bloom Vocal's Clear Lyric Diction (G-1), Crisp Final Consonants (G-2), and Lyric Emotion Mapping (F-3) exercises train both sides of this together.

How to Train Toward Her Style

Step 1 — Confirm your comfortable low-to-mid range and chest resonance

Run a range test to find the low-to-mid section where you can produce a thick tone without straining. Before attempting any signature passage, check how naturally chest resonance shows up in that section — it matters more than reaching for an exact pitch on the first try.

Step 2 — Hold a straight tone through the low-to-mid register without wavering

Pick a slow, jazz-inflected phrase like "Bebe" and sustain a note with a straight tone, no vibrato, to check whether the tone color stays steady from start to finish. This is a direct check on chest-voice support.

Step 3 — Practice suppressing overtones to blend inside harmony

Against a chord progression or an imagined harmony line, deliberately pull back your own overtones so your voice blends rather than cuts through. Keep the volume pulled back while keeping breath support underneath it intact — that's the part most learners skip.

Step 4 — Anchor consonants to an emotional lyric arc

Choose an emotionally direct ballad lyric, like the kind heard in "That day", and practice articulating consonants clearly while mapping your emotional delivery to the shape of the lyrics rather than letting the words blur.

Step 5 — Run an AI feedback loop on a single phrase

Choose a 4-to-8 bar phrase that requires both low-register support and harmony blending, record it, and use Bloom Vocal's AI coaching to score your pitch accuracy, breath support, and expression. The AI surfaces habits — a low tone thinning out, or overtones pushing too far forward in a blend — that are hard to catch by self-listening alone.

Check Your Cover with AI

Ear-based imitation has a ceiling: you can't reliably hear your own low tone thinning out, or your overtones cutting through a blend when they shouldn't, while you're singing. Record a passage from her repertoire — the low-to-mid section of "Bebe" or the emotional arc in "That day" — and Bloom Vocal's AI scores your pitch accuracy, breath support, register transitions, rhythm, and expression on a 1–5 rubric, then recommends the specific exercises to address your weakest area first. It turns "that didn't feel right" into "your chest support dropped out on the low notes — drill Chest Resonance Activation and Appoggio Technique."

For more on how to sing like other K-pop main vocalists, see Eunha (GFRIEND), Yerin (GFRIEND), Solji (EXID), and Hyojung (OH MY GIRL).

---

References

• Sadolin, C. (2000). Complete Vocal Technique. Shout Publishing. [Chest-resonance-based low-register support and the overtone-suppression mechanism behind harmony blending.]
• Titze, I. R., & Verdolini Abbott, K. (2012). Vocology: The Science and Practice of Voice Habilitation. National Center for Voice and Speech. [Subglottal pressure management underlying stable chest-voice phonation and breath support.]