Reuters - Wed Nov 4, 2009 11:33pm EST

By Silvio Pietroluongo

NEW YORK (Billboard) - R&B singer Jason DeRulo has become the fourth artist this year to claim the top spot on the Billboard Hot 100 with his first charting single.

DeRulo's "Whatcha Say" traded places with "Fireflies," from fellow newbie synth-pop star Owl City, which slipped to No. 2. The other artists to take their debut singles to No. 1 this year were Jay Sean with "Down" (off one to No. 4 on the new chart) and Lady Gaga with "Just Dance."

Gaga, meanwhile, held at No. 6 with "Paparazzi" and boasted the chart's top debut at No. 9 with "Bad Romance," one of the new tracks from her upcoming album re-release "The Fame Monster."

Another album reissue has led to one of the most intriguing Hot 100 happenings. Taylor Swift, with each of the new tracks on her "Fearless" reissue, has become the first artist in the history of the Hot 100 to debut five songs within the top 30 in a single week.

"Jump Then Fall" fared the best, opening at No. 10, followed by "Untouchable" (No. 19), "The Other Side of the Door" (No. 22), "Superstar" (No. 27) and "Come In With the Rain" (No. 30). Those tracks joined three other Swift singles on the list. A new version of "Forever & Always" re-entered at No. 34, alongside chart holdovers "You Belong With Me" (No. 14) and "Fifteen" (No. 49).

Swift's eight chart listings give her the record for most charted titles in a single week by a female artist. Among all artists, the Beatles lead with 14 entries (April 1964).

Back in the top 10, Jay-Z and Alicia Keys jumped 10 places to No. 3 with "Empire State of Mind." The duo performed the song prior to game 2 of the baseball World Series last Thursday. Jay-Z's prior single "Run This Town," with Rihanna and Kanye West, fell two to No. 7. Miley Cyrus slipped one to No. 5 with "Party In The U.S.A." and Britney Spears held at No. 8 with "3."