Sean Penn Incident: In 1987, Madonna and Sean Penn's marriage had problems. Sean was accused of hitting Madonna with a baseball bat, but Madonna denied it.

 Michael Jackson Feud: In 1991, Michael Jackson called Madonna "nasty" after they had a disagreement.

 Explicit Photo Book: In 1992, Madonna released a photo book with explicit content that upset many people.

David Letterman Show: In 1994, Madonna used strong language on David Letterman's show and refused to kiss someone in the audience.

MTV Awards Kiss: In 2003, Madonna kissed Britney Spears and Christina Aguilera on stage at the MTV Video Music Awards, causing a lot of fuss.

Lady Gaga Feud: In 2011, Madonna criticized Lady Gaga’s song "Born This Way," saying it copied her song "Express Yourself."

 "Like a Prayer" Video: Madonna’s 1989 video for "Like a Prayer" was controversial for its provocative images, including burning crosses, which upset the Vatican.

Return of "Like a Prayer": Madonna’s song "Like a Prayer" came back to the charts after 35 years.