This Week in Billboard Chart History: In 2010, Kesha's 'TiK ToK' Topped the Hot 100

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Kesha performs on day two of Wireless Festival at Hyde Park on July 2, 2011 in London, England.

The singer reigned with her debut smash. Plus, remembering feats by Elton John, Madonna & Missy "Misdemeanor" Elliott.

Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history.

Jan. 2, 2010
With her first single, Kesha clocked her first Billboard Hot 100 No. 1 – and the first No. 1 of the 2010s – with "TiK ToK."

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, 1975
Elton John scored his third of nine Billboard Hot 100 No. 1s (to date) with "Lucy in the Sky With Diamonds." Originally on the Beatles' iconic 1967 album Sgt. Pepper's Lonely Hearts Club Band, the song became a No. 1 thanks to John, and with John Lennon's involvement (backing vocals and guitar).

Jan. 5, 1991
MTV famously refused to show the song's racy video, but that didn't hurt its popularity. In fact, it fueled its fire. "Justify My Love" became Madonna's ninth Billboard Hot 100 No. 1 (of 12 total).

Jan. 6, 1979
Bee Gees earned their seventh of nine Billboard Hot 100 No. 1s, ballad "Too Much Heaven." The trio tallied all nine leaders in the '70s, the most of any act that decade.

Jan. 7, 1995
Green Day crowned the Alternative Songs chart for a third time with "When I Come Around." The trio has added seven more No. 1s since, most recently "Bang Bang" in November.

Jan. 8, 2000
Missy "Misdemeanor" Elliott earned her first of three No. 1s on Billboard's Hot R&B/Hip-Hop Songs chart, as "Hot Boyz," featuring Nas, Eve and Q-Tip, sizzled 2-1.