Irritable Piers Morgan bans Madonna from his shows

Piers Morgan has got it out for Madonna. The CNN host tweeted this message during her one day on Twitter yesterday: "Welcome to Twitter. You're still banned from my show. Love Piers X." Madonna's manager tweeted back: "Really?" and attached a letter asking that Madonna be a guest on the British version of Morgan's talk show. To which Morgan volleyed: "Madonna has only been banned from my CNN show, not my UK show, which sent that invite. But I'm now banning her from that too." Sources tell TMZ that Madonna doesn't know why Morgan is mad at her. Morgan told Us Weekly last year that the singer has been "an irritant in his life for 20 years."