The pop star took to Twitter today to send her love to the Jackson family and reflect on the life of the late pop legend on the four-year anniversary of his death.
"My thoughts are with the Jackson family today. Honored to have shared a stage with him. Miss u Michael!" the 31-year-old performer wrote.
The tweet was accompanied by a pic of the pair performing "The Way You Make Me Feel" for Jackson's 30th Anniversary Celebration, which aired on CBS in 2001.
After the singer's passing, Spears also paid tribute to her musical muse, "He has been an inspiration throughout my entire life and I'm devastated he's gone!"
Watch the video of the duo sharing the stage as you reminisce over Jackson's extraordinary career.
Do you have a favorite Michael moment? Tell us in the comments!