Vivendi's Universal Music, the world's largest seller of recorded music, is vaulting to the top spot in music publishing, too, after agreeing to buy BMG Music Publishing for 1.63 billion euros ($2.1 billion). German media conglomerate Bertelsmann AG, BMG Music Publishing's parent company, also said it would pay Vivendi $60 million to settle litigation related to financing it once provided to file-sharing service Napster.