Kiss of Life said it aimed to return to its roots with the physical single “Who Is She,” released Monday. The group, which debuted in July 2023 with its first EP “Kiss of Life,” quickly built a fandom with music heavily influenced by R&B, hip-hop and dance-pop, often incorporating a 2000s-inspired sound. Its new title track “Who Is She” is a dance-pop song that reinterprets early 2000s styles with a modern sound, reflecting the group’s commitment to staying true to its original mindset — not by