ET caught up with the rapper at the official launch party of Paris Hilton's BooHoo collection on Thursday, where she also revealed what it would take to get a 'Lady Marmalade' reunion together.

ET has been with the superstar singer since day one of her nearly 20-year long career. From the 'Genie in a Bottle' music video set, to being backstage right after she won her first GRAMMY, we're revisiting all of Aguilera's most electrifying milestones.

The theme of girl power resonated with several artists throughout the night, including Taylor Swift, who praised women in music after winning Top Female Artist.