Madonna on Twitter...for three hours

THE SOCIAL MATERIAL GIRL: Madonna has followed her first foray into social networking—Saturday’s interview with Jimmy Fallon, which was streamed on her Facebook page —by joining Twitter, but only for a few hours last night, to promote yesterday’s release of MDNA. Her live chat began at 10 p.m. EDT and ended three hours later. A social-only promotion for a music-industry launch of this size is the first of its kind, the Wall Street Journal noted. “The idea was to do things differently,” manager Guy Oseary told the paper. More details and pics at pinterist.com. (3/27a)