Kanye West at 2009 VMA's interrupted which celebrity?

Kanye West interrupted Taylor Swift at the 2009 VMAs because he believed that Beyoncé deserved the award for Best Female Video instead of Swift. He grabbed the microphone from Swift as she was accepting her award and stated that Beyoncé had one of the best videos of all time, causing a significant stir and outrage among the audience and viewers alike. This infamous incident sparked controversy and became a highly memorable and talked-about moment in pop culture history.