In 1991, the controversial single ruled the Hot 100. Plus, remembering chart feats by the Beatles, Green Day & Missy Elliott.

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

Jan. 4, 1975

Elton John scores 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). The song continued a showcase of the pair's combined talents, as, in 1974, the two had teamed for Lennon's No. 1 "Whatever Gets You Thru the Night."

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. On this date 25 years ago, "Justify My Love" became Madonna's ninth Billboard Hot 100 No. 1 (of 12 total).

Jan. 6, 1996

It was 20 years ago today … that the Beatles peaked at No. 6 with their last Billboard Hot 100 top 10 (so far), "Free as a Bird." The group's reunion hit (featuring John Lennon's vocals from 1977 and produced by Jeff Lynne and the Fab Four) became its 34th top 10, a sum second only to Madonna's 38.

Jan. 7, 1995

Green Day crowned the Alternative Songs chart for a third time with "When I Come Around." The trio has added six more No. 1s since.

Jan. 8, 2000

Missy "Misdemeanor" Elliott earns 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, sizzles 2-1. (How high did the track rank when Billboard counted down the top 100 hits of the Hot Rap Songs chart's first 25 years in 2014? Click here to find out.)

Jan. 9, 1988

Whitney Houston notched her sixth of a record seven consecutive Billboard Hot 100 No. 1s, as "So Emotional" rose 2-1.

Jan. 10, 1998

Usher spends his first week at No. 1 on the Top R&B/Hip-Hop Albums chart with My Way. To date, his five leaders on the list have reigned for a cumulative 25 weeks.