Red Velvet (레드벨벳) – Really Bad Boy (RBB) | Hidden Vocals Harmonies & Adlibs

Red Velvet (레드벨벳) – In & Out | Hidden Vocals Harmonies & Adlibs

Red Velvet - Really Bad Boy (RBB) | Line Distribution

Classical Musicians React: Red Velvet 'RBB (Really Bad Boy)'

Red Velvet (레드벨벳) – Psycho | Hidden Vocals Harmonies & Adlibs

Red Velvet - Feel My Rhythm (Hidden / Background Vocals) (Visualization)

[BEST] RED VELVET - RBB (Really Bad Boy) (CLEAN ACAPELLA)

Vocal Coach |Reaction Red Velvet 레드벨벳 'RBB (Really Bad Boy)' MV

TWICE (트와이스) – Cry For Me | Hidden Vocals Harmonies & Adlibs

[HIDDEN VOCALS] Red Velvet - Russian Roulette

Red Velvet (레드벨벳) – Umpah Umpah | Hidden Vocals Harmonies & Adlibs

Red Velvet~Bad Boy (Vocal Analysis)

아이린 IRENE is effortlessly funny

Red Velvet (레드벨벳) Irene & Seulgi – Monster | Hidden Vocals Harmonies & Adlibs

Red Velvet - Peek-A-Boo (Vocal Analysis) [Lead + Hidden Vocals]

Hidden backup vocals/harmonies in Red Velvet's Rookie

RED VELVET - Coachella 2022 Set (Act 1) [Fanmade]

Red Velvet 레드벨벳 'RBB (Really Bad Boy)' MV

TWICE - FANCY (Hidden/Background & Lead Vocals + Ad-libs)

Best of Red Velvet's Hidden Vocals!

Red Velvet (레드벨벳) – Queendom | Hidden Vocals Harmonies & Adlibs