News Madonna Tweets Fans, Asks Bieber to Appear On Tour By Raphael Chestang 8:43 PM PDT, March 26, 2012 Twitter Madonna joined Twitter for the day on Monday, holding a Q&A with fans ahead of her album's release on Tuesday.One of those fans just happened to be teen pop sensation Justin Bieber, who congratulated Madonna on her new album. Madonna extended a special invitation the Biebs' way, writing, "Come and join me on stage when I'm on tour when we are in the same city and congrats on your new single."Justin Bieber Wants to be Your Boyfriend Bieber's first single from his upcoming album, Boyfriend, dropped today.Madge also revealed a recent mishap, confirming, "Yes. I have a broken finger. I broke it the other day. My pinky just at the top."Madonna Debuts 'Wild' Remix During Guest Pop-InIn only one day, the account (@MadonnaMDNAday) gained over 25,000 followers, fielding questions under the hashtag #askmadonna.Madonna's 12th studio album and her first LP in four years, MDNA, drops Tuesday.