What makes I Will Be by Leona Lewis notable?

The song reached number one on the UK Singles Chart, showcasing Lewis's strong vocal ability and emotional delivery. It also marked a significant moment in her career as it was the lead single from her second studio album, reinforcing her presence in the pop music landscape post-'X Factor.' Its success contributed to the ongoing popularity of ballads in mainstream pop during that era. Leona Lewis was riding the wave of her early success as a winner of 'The X Factor' when she released 'I Will Be.' This single followed her debut album, 'Spirit,' which achieved global acclaim and commercial success, solidifying her status as a pop sensation. By 2009, she was in a transitional phase, aiming to build on her initial triumph with this new material.