But while the parents might be anxious, world leaders stepped in to wish her well. The news was featured prominently on front pages in Argentina, India, France, South Africa and other countries. It sent Twitter into a tizzy, with the hashtag ‘‘royalbaby’’ trending worldwide and used more than 28,000 times in the first few hours following the official announcement. U.S. media websites such as People, Vanity Fair and the Daily Beast provided extensive coverage, with the Huffington Post launching a live blog to track developments.