This Week in Billboard Chart History: Ke$ha Kicked Off the 2010s at No. 1
Her debut smash "TiK ToK" clocked in as the first new leader of the decade. Plus, remembering key chart feats for the Beatles, the Monkees and Beyonce.

Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history
Dec. 29, 2007
Seven years ago today, Colbie Caillat was celebrating with “Bubbly”: her debut smash was amid a 13-week command on Adult Pop Songs.
Dec. 30, 1967
The Beatles tally their 15th Billboard Hot 100 No. 1 with “Hello Goodbye.”
Dec. 31, 1966
Less than two months after notching their first Billboard Hot 100 No. 1 with “Last Train to Clarksville, the Monkees rolled to No. 1 again with the Neil Diamond-penned classic “I’m a Believer.”
Jan. 1
Happy New Year! From U2 to you.
Jan. 2, 2010
With her first single, Ke$ha clocked her first Billboard Hot 100 No. 1 with “TiK ToK” five years ago today.
Jan. 3, 1976
The Bay City Rollers skated to No. 1 on the Billboard Hot 100 with their debut chart entry, the bubblegum pop/dance hit “Saturday Night.” Despite their name, they weren’t from Bay City, Michigan, but Edinburgh, Scotland. They got their name by throwing a dart at a map of the U.S., which landed guess where …
Jan. 4, 2014
Let’s flash back all the way to … a year ago today. These songs all debuted on the Billboard Hot 100, becoming some of 2014’s buzziest hits: Beyonce‘s “Drunk in Love” (featuring Jay Z) (new at No. 12), Brantley Gilbert‘s “Bottoms Up” (No. 58) and Jason Derulo‘s “Talk Dirty” (featuring 2 Chainz) (No. 89).