ET caught up with the singer at D23 Disney Legends in Anaheim, California, on Friday.
The singer is feeling "all types of emotional" about her breakthrough single's big milestone.
ET spoke with the singer backstage at her The Xperience residency at Zappos Theater at Planet Hollywood in Las Vegas over the weekend.
The pop star also opens up about NBC's decision to have Gwen Stefani step in to replace the Maroon 5 frontman as a coach.
The 'Genie In a Bottle' crooner kicked off her Las Vegas residency, 'Xperience,' at Planet Hollywood Resort & Casino on Friday.
The CNN anchor is so sweet with Cohen's son!
ET looks back on Christina Aguilera's greatest GRAMMY fashion moments. The GRAMMY Awards air Feb. 10 on CBS.
Will Bradley Cooper, Lady Gaga and Kendrick Lamar start the final push to the Oscars with gold on GRAMMY night?
The pop diva insisted she didn’t remember taking a swing at her “Lady Marmalade” collaborator.
Christina Aguilera also shared her reaction to Lifetime's documentary series, 'Surviving R. Kelly.'
The singer also reflected on Lady Gaga's decision to remove her collaboration with Kelly from streaming platforms.
“Is Christina Aguilera singing ‘bout ya or are these voices in your head?"
Aguilera and Lovato collaborated on the single 'Fall in Line,' which is currently nominated for a GRAMMY.
The 16-show residency will kick off on May 31 and continue with performances in June, September and October.
