In celebration of the chart's 55th Anniversary, we're counting down the 100 biggest Hot 100 hits ever.

70

"Rush Rush" - Paula Abdul

Hot 100 Peak: No. 1 for five weeks (1991)

Abdul told her label, "I don't care what songs make it onto the album, I want 'Rush Rush' to be the first single." Virgin execs told her to finish her second album and then decide. "But I'm really glad 'Rush Rush' was the first single," she says. It became her longest-running No. 1.

69

"Ebony and Ivory" - Paul McCartney and Stevie Wonder

Hot 100 Peak: No. 1 for seven weeks (1982)

McCartney and Wonder recorded the duet together, on the island of Montserrat in the West Indies. But it's only through the magic of editing that they appear to be in the video together, performing on the white and black keys of a piano.

68

"Moves Like Jagger" - Maroon 5 feat. Christina Aguilera

Hot 100 Peak: No. 1 for four weeks (2011)

"The Voice" judges Adam Levine and Christina Aguilera teamed up to give Maroon 5 its biggest hit to that date. It was Maroon 5's first No. 1 in four years and Aguilera's first No. 1 in 10 years.

67

"Whoomp! (There It Is)" - Tag Team

Hot 100 Peak: No. 2 (1993)

The title was already a catchphrase in the South when Steve (Roll'n) Gibson and Cecil (DC) Glenn recorded this bassline-heavy hip-hop track. Glenn was a cook and a DJ at Magic City in Atlanta and played the song in the club, creating the initial demand for the single.

66

"Aquarius/Let the Sunshine In" - the 5th Dimension

Hot 100 Peak: No. 1 for six weeks (1969)

When group member Billy Davis, Jr, left his wallet in a New York taxi, it was found by one of the producers of the Broadway musical "Hair." A grateful Davis invited him to see the 5th Dimension live and the producer reciprocated by inviting the group to see "Hair." Before they left the theater, they agreed they had to record "Aquarius." Producer Bones Howe said it was "half a song" and suggested a medley with the show's "The Flesh Failures (Let the Sunshine In)."

65

"I Love Rock 'n Roll" - Joan Jett & the Blackhearts

Hot 100 Peak: No. 1 for seven weeks (1982)

Jake Hooker and Alan Merrill wrote the song to refute the Rolling Stones' "It's Only Rock 'n Roll (But I Like It)," which they felt was a put-down. They recorded it with their group the Arrows in the U.K. and Jett saw them perform it on TV. She asked Hooker if she could record it, but couldn't get her group the Runaways to cut the song. She finally recorded it as a solo artist, first as a B-side in Holland in 1979 and then again in 1981 with the Blackhearts.

64

"Because I Love You (The Postman Song)" - Stevie B

Hot 100 Peak: No. 1 for four weeks (1990)

Warren Allen Brooks wrote the song years before he met Stevie B. "Stevie heard me sing it…in 1985 and he would tell everybody, 'Listen to Warren's song – that could be a hit.'" Five years later, Stevie was proven right.

63

"The Boy Is Mine" - Brandy & Monica

Hot 100 Peak: No. 1 for 13 weeks (1998)

Atlantic A&R staffer Paris Davis suggested to producers Rodney Jerkins and Dallas Austin that Brandy and Monica record a song called "The Boy Is Mine," "like when Michael (Jackson) and Paul McCartney did 'The Girl Is Mine.'" The duet gave both women their first Hot 100 No. 1.

62

"(Just Like) Starting Over" - John Lennon

Hot 100 Peak: No. 1 for five weeks (1980)

Lennon took a five-year recording hiatus while he raised his son Sean, then went back into the studio to record songs for the "Double Fantasy" album. This song was No. 6 on the Hot 100 when Lennon was assassinated on Dec. 8, 1980. The title had become a grim irony by the time it was a posthumous No. 1 the week of Dec. 27.

61

"Centerfold" - J. Geils Band

Hot 100 Peak: No. 1 for six weeks (1982)

Signed to Atlantic in 1969, the group moved to EMI-America in 1978. Their first 12 entries failed to crack the top 10 of the Hot 100 but the first single from their "Freeze-Frame" LP changed their chart fortunes when it became their first No. 1 hit.

PREVIOUS: Nos. 80-71 | NEXT: Nos. 60-51