ALERT THE MEDIA—ROCK ISN’T DEAD! Sales on Coldplay’s Ghost Stories, strong since the album’s 5/19 release, picked up additional momentum over the weekend, prompting us to ask: Cab it top 400k? For the record, the last five rock albums to debut north of 375k were Mumford & Sons’ Babel, 600k (9/2012); Coldplay’s Mylo Xyloto, 447k (10/2011); U2’s No Line on the Horizon, 484k (5/2009); AC/DC’s Black Ice, 784k (10/2008); and Metallica’s Death Magnetic, 490k (9/2008). (5/27a)