When did Jennifer Lopez assume name j lo?

Jennifer Lopez began using the nickname "J.Lo" in the early 2000s, around the time of her rise to fame with hits like "Love Don't Cost a Thing" and her debut album "On the 6," released in 1999. The nickname was popularized further with her film roles and music career, becoming a recognizable brand associated with her persona. Over the years, J.Lo has embraced the name, using it in her music, fashion, and various business ventures.