Plus, remembering feats by LMFAO, Miley Cyrus & more.

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

July 15, 2000

Vertical Horizon leapt to No. 1 on the Billboard Hot 100 with "Everything You Want." The track also crowned Adult Pop Songs for 14 weeks and hit the Alternative Songs top five.

July 16, 2011

We partied! LMFAO's "Party Rock Anthem," featuring Lauren Bennett and GoonRock, spent its first of six weeks atop the Billboard Hot 100. The song would also reign as the No. 1 song of the summer for 2011.

July 17, 1961

A happy 58th birthday to Billboard's Adult Contemporary chart. The ranking originated with Brook Benton's lighthearted "The Boll Weevil Song" as its first No. 1. In all, 815 songs have led the list, with Maroon 5's current No. 1 "Girls Like You" boasting the longest reign – 30 weeks so far – to date.

July 18, 2009

Speaking of, Miley Cyrus' "The Climb" completed its climb to No. 1 on Billboard's Adult Contemporary tally. The song marked her first hit on the survey after she'd made her mark with younger fans familiar with her Disney acting roles.

July 19, 1980

Billy Joel's 13th Billboard Hot 100 hit was a lucky one: "It's Still Rock and Roll to Me" became his first No. 1. He'd reign again with "Tell Her About It" in 1983 and his musical history lesson "We Didn't Start the Fire" in 1989.

July 20, 1991

EMF hit No. 1 on the Billboard Hot 100 with "Unbelievable." What does the U.K. group's moniker stand for? Epsom Mad Funkers, the name of a fan club of fellow British band New Order.