It seems like only two tracks stand a chance of unseating “TiK ToK,” starting with Lady Antebellum’s “Need You Know,” which jumped from Number Eight to Number Three, marking the first time a country ...

Wondering what all the fuss is about? If you’ve somehow managed to escape “TiK ToK,” hear it here: Look back at the year’s other big singles in our list of the 25 Best Songs of 2009.

Dear Ke$ha: you’re among friends here. You can admit that “Tik Tok” is actually a love letter to Star Trek. Ke$sha has admitted that her hit pop song, “Tik ...