Born and raised in Hawaii with roots in Japan, France, the Philippines, Germany, and Mexico. Kaylenn began her music career at 11 as part of the ukulele & vocal duo Tegan & Kaylen, becoming the youngest artist to perform at Fuji Rock Festival, Japan's largest music festival (2018). Their debut song was featured as a commercial song for JAL (Japan Airlines) Hawaii. After exploring musical theater and competing on the global audition show Chuang Asia in 2024, she launched her solo career in 2025, crafting R&B-rooted melodies with an airy, silky vocal texture. Her cover of Aaliyah's "At Your Best" has surpassed 370,000 views, drawing global attention to her sound.