This is actually pretty well known. She was very salty about it afterwards, even throwing shade at Britney and Madonna’s single and video for “Me Against the Music”. And when asked if she would collaborate with Madonna, she responded, “maybe Madonna 10 years ago.” She must have gotten over it because her 2010 music video “Not Myself Tonight” was complete homage to Madonna with scenes being directly lifted from “Express Yourself” and “Human Nature”.