LOS ANGELES (AP) — There are 50 positions on the Billboard Hot Rock Songs chart. David Bowie occupies 21 of those spots. The highest-ranking song is “Lazarus” at number 3. All seven songs from his “Blackstar” album are on the chart. Bowie shatters the record held by Mumford and Sons, who had 14 songs on the chart after the release of their “Babel” (BAY’-bel) album in 2012.