Bella Kathleen Ann Williams (born March 23, 2006), better known as Bella Kay, is an American indie pop singer-songwriter based in Orlando, Florida. She gained popularity in 2025 with her debut single "The Sick" that peaked at number 33 on the UK singles chart. Her 2026 single "Iloveitiloveitiloveit" became her first entry on the US Billboard Hot 100, peaking at number 17. It also charted in the UK at number 2. In November 2025, she released her debut EP Sick to My Stomach.
