Week of March 14

Chart newcomers dominate this week's debuts, with the only debut from a veteran coming from John Mayer. "Heartbreak Warfare," at No. 37, is Mayer's 10th hit since 2002, when he went to No. 1 with "No Such Thing." He's gone back to the top two more times -- with "Your Body Is a Wonderland" (four weeks in 2002) and "Waiting on the World to Change" (one week in 2006).

Musician/actor Christian Kane has actually been around as long as Mayer -- recording as part of the country/rock act Kane in the early part of last decade -- though he's probably best known in the mainstream as the actor who played the lawyer Lindsey on the "Buffy the Vampire Slayer" spinoff "Angel" for three seasons. He's recording solo as a country/rock artist these days, and "The House Rules" (at No. 39) is from his new, self-titled EP.

The No. 1 song this week in Billboard, "Break Your Heart," by Taio Cruz featuring Ludacris, enters at No. 35, the first entry on my charts for either act (though rapper Ludacris has had a few dozen hits nationally in the past decade). The rap/hip-hop act Kidz in the Hall enters at No. 40 with its first hit, "Jukebox." "American Idol" contestant from last season Danny Gokey comes in at No. 36 with "My Best Days Are Ahead of Me," while singer Diane Birch remakes Haddaway's No. 1 hit from 1993, "What Is Love?" as a piano-driven ballad, at No. 38.