Ke$ha's "TiK ToK" tacks on a fifth week atop the Billboard Hot 100 and moves into the pole position of Radio Songs (2-1), claiming the No. 1 spot with 119.7 million listener impressions. The title also maintains its perch atop Digital Songs, shifting 244,000 downloads (down 4%).
 
Lady Gaga waits patiently at No. 2 for a sixth week with "Bad Romance" while former No. 1 "Empire State of Mind" by Jay-Z and Alicia Keys holds at No. 3.
 
Young Money grabs Airplay Gainer honors for "BedRock," featuring Lloyd, which rolls 8-4. Iyaz's "Replay" retreats 4-5 while "Sexy Chick" by David Guetta featuring Akon holds at No. 6.
 
Train revisits the top 10 of Hot 100 for a second time, and the first time in over eight years, as "Hey, Soul Sister" soars 23-7. The band last reached the upper tier with its second charting single, "Drops Of Jupiter (Tell Me)," which peaked at No. 5 in June 2001.
 
"Hey, Soul Sister" is the chart's Digital Gainer, improving by 81% to 172,000 downloads, good enough for a No. 3 ranking on the Digital Songs chart.
 
Back to the Hot 100 top 10, "Hard" by Rihanna featuring Jeezy rises 9-8 and Owl City's "Fireflies" descends 5-9.
 
Ludacris ties Jay-Z for most Hot 100 top 10s since 2000 as "How Low" becomes his 14th appearance in the upper tier (14-10), with half of that total coming as a featured vocalist.
 
Sade scores its best-ever Hot 100 debut with its first charting track since 2001's "By Your Side" as "Soldier" is the Hot Shot Debut at No. 58.
 
Coming in with the next-best debut is Lady Antebellum's "Ready to Love Again" at No. 72. It's the fourth track from the trio's "Need You Now" album, due Jan 26, to hit the Hot 100 as iTunes has been rolling out a new track each week leading up to the set's release. Meanwhile, the album's title track regains its bullet at No. 17 thanks to increased pop radio airplay.
 
Other notable debuts include Jay-Z and Swizz Beatz's "On to the Next One" (No. 78), "Set The Fire to the Third Bar" by Snow Patrol featuring Martha Wainwright (No. 86), Miley Cyrus' "When I Look at You"(No. 88) and Pearl Jam's "Just Breathe" (No. 99).
 
Also among the new entries is a pair of tracks residing in the top 20 of the Country Songs chart. Keith Urban's "'Til Summer Comes Around" debuts at No. 92 (No. 12 Country) and Zac Brown Band opens at No. 98 (No. 18 Country) with "Highway 20 Ride."