In 1999, the music charts were dominated by a variety of popular singles across different genres. Notable hits included Britney Spears' "…Baby One More Time," which marked her debut and became a cultural phenomenon. Other significant singles included Ricky Martin's "Livin' la Vida Loca" and Christina Aguilera's "Genie in a Bottle," both of which showcased the rise of pop music during this era. The year also saw the emergence of alternative rock and hip-hop in mainstream music. Singles like Santana's "Smooth," featuring Rob Thomas, and Eminem's "My Name Is" highlighted the diversity of the charts. Overall, 1999 was a pivotal year for music, setting the stage for future trends.