Madonna recently criticized on her MDNA tour. She poked fun at the similarity between Gaga's "Born This Way" and her 1989 song "Express Yourself". Madonna says she tried to make peace, but Gaga wanted nothing to do with it.
She said at a concert in St. Paul, Minnesota: "I have the best fans in the whole world. So take that, Lady Gaga! You know, I invited her onstage to sing with me. But, she turned me down. It's okay. I've been rejected before. It builds a little character."
Madonna will finish her North American tour on November 20 in Miami. She will then go to South America.