Just some trivia for you; the one artist I know of with three #1 debuts as a lead artist, but not four, is Eminem. The Black Eyed Peas, Katy Perry, and Madonna are some artists with two each.
Over on the Digital Songs chart, Taylor Swift scores her fifth No. 1 as "Begin Again" bows in the top slot with 299,000 downloads sold. It's the latest preview single from her upcoming "Red" album. Watch for the set's title track to impact the Digital Songs chart next week, as it was released to retailers on Oct. 2.