"TiK ToK" holds at No. 2 on Digital Songs, trailing that chart's leader, Lady Gaga's "Bad Romance," by under 1,000 downloads. "Bad Romance," meanwhile slips 2-3 on the Hot 100 even though it is the chart's Airplay Gainer (up 13.5 million listener impressions). Ke$ha overtakes Lady Gaga on the Hot 100 despite trailing "Bad Romance" on both Radio Songs and Digital Songs due to "Tik Tok's" large lead in streaming points from activity on AOL and Yahoo!. The unit difference between the top entries on Digital Songs is the chart's smallest since this very week in 2005, when Mariah Carey's "All I Want For Christmas Is You" prevailed over Eminem's "When I'm Gone."
Below the top three, Iyaz's "Replay" and "Fireflies" by Owl City stand still at No. 4 and No. 5, respectively. "Sexy Chick" by David Guetta featuring Akon (7-6) swaps spots with former No. 1 "Whatcha Say" by Jason Derulo, whose sophomore single, "In My Head," debuts at No. 63.
The last three spots in the top 10 mirror last week's ranking, as the Black Eyed Peas' "Meet Me Halfway" (No. 8), "3" from Britney Spears (No. 9) and Jay Sean's "Down" (No. 10) hold steady. It's the second week in a row that the top 10 of the Hot 100 has failed to welcome a new title into its ranks.
Ludacris posts the best Hot 100 debut of his career, as "How Low" opens at No. 13 and claims the week's Hot Shot Debut title, thanks to strong first week download sales (93,000). "How Low" is Ludacris' best start since he was a featured vocalist, with Usher, on Lil Jon & The East Side Boyz's "Lovers & Friends" (No. 36 in 2004). The rapper's best debut with one of his own songs was at No. 48, with "Georgia" in 2006.
This is the last Hot 100 chart of Billboard's calendar year (based on our Dec. 26 chart date), and as a result the "Glee" Cast overtakes Lil Wayne for the most charting tracks during 2009. Four more entries from the show join the list: "My Life Would Suck Without You" (No. 51), "Don't Rain On My Parade" (No. 53), "You Can't Always Get What You Want" (No. 71) and "And I Am Telling You I'm Not Going"(No. 94). With those four debuts, the "Glee" cast's chart total for the year increases to 25. That's three more credited titles than rapper Lil Wayne posted over the last 12 months, as this week's debut at No. 62 -- "On Fire," from his just-leaked "Rebirth" album -- is his 22nd entry.