Poll: What is Beyonce's Best '4' Music Video?
Poll: What is Beyonce's Best '4' Music Video?

'4' SCORES: Beyonce and Adele are doing quite a number on the Billboard 200.

Beyonce's new leader "4" roars in at No. 1, a spot above Adele's former 10-week topper "21." Despite the titles' lock on the Billboard 200's top two spots, just nine solely-numerical titles (including roman numerals) have now reigned since the chart launched as a weekly survey the week of Match 24, 1956.

Beyonce Notches 4th Billboard 200 No. 1 with '4'

Coincidentally, Beyonce's "4" and Adele's "21" each share the titles of prior Billboard 200 No. 1s, by Foreigner and Omarion, respectively:

Year Reached No. 1, Title, Artist, Weeks at No. 1
1981, "4," Foreigner, 10
1986, "5150," Van Halen, three
1994, "II," Boyz II Men, five
2000, "1," the Beatles, eight
2006, "3121," Prince, one
2006, "IV," Godsmack, one
2007, "21," Omarion, one
2011, "21," Adele, 10
2011, "4," Beyonce, one

This week marks the first frame in which all-numerical titles have held the Billboard 200's No. 1 and 2 positions simultaneously.

'ROCK' ERA: The Billboard Hot 100 likewise sports a new No. 1, as LMFAO's "Party Rock Anthem," featuring Lauren Bennett and GoonRock, rises 2-1.

LMFAO Brings the 'Party' to Top of Hot 100

The song is just the 11th of the chart's 1,005 leaders to feature the word 'rock' in its title:

"Crocodile Rock," Elton John, 1973
"Rock the Boat," the Hues Corporation, 1974
"Rock Your Baby," George McCrae, 1974
"Rock Me Gently," Andy Kim, 1974
"Rock'n' Me," Steve Miller, 1976
"Rock With You," Michael Jackson, 1980
"It's Still Rock and Roll to Me," Billy Joel, 1980
"I Love Rock & Roll," Joan Jett and the Blackhearts, 1982
"Rock Me Amadeus," Falco, 1986
"Rock On," Michael Damian, 1989
"Party Rock Anthem," Lauren Bennett and GoonRock, 2011

(Jett didn't specify whether she liked rock and roll equally or one more than the other, but among Hot 100 leaders, "rock" has been more prevalent than "roll." Here are the select six songs that have "roll"-ed to No. 1 (two of which also "rock"-ed): "Papa Was a Rollin' Stone," the Temptations, 1972; "Love Rollercoaster," Ohio Players, 1976; "It's Still Rock and Roll to Me"; "I Love Rock & Roll"; "Roll With It," Steve Winwood, 1988; and, "Rolling in the Deep," Adele, 2011).

THE 'PARTY' DON'T STOP: While "Party Rock Anthem" is the 10th song to "rock" the Hot 100's summit, it's just the second No. 1 with the word "party" in its title.

It had been 48 years, one month and one week since the last such celebration: Lesley Gore declared (not so joyously) "It's My Party" the weeks of June 1 and 8, 1963.

In between, three other "party" songs peaked at No. 2: Eddie Murphy's "Party All the Time" (1985), Shop Boyz' "Party Like a Rockstar" (2007) and Miley Cyrus' "Party in the U.S.A." (2009).

(LMFAO's maiden leader is the Hot 100's first No. 1 with "anthem" in its name).

As "Party Rock Anthem" replaces Pitbull's "Give Me Everything," featuring Ne-Yo, Afrojack and Nayer, songs credited to four artists reign back-to-back for the first time in the Hot 100's history.

"Party" and "Give" are the first leaders by a quartet of acts since Nelly's "Grillz," featuring Paul Wall, Ali and Gipp, led for two weeks in January 2006.

LMFAO is also the eighth group whose name consists solely of an acronym to rule the Hot 100. Here are all such acts (act-ronyms?):

Artist, Title, Year
MFSB, "TSOP (The Sound of Philadelphia)," 1974
AWB, "Pick Up the Pieces," 1975
ABBA, "Dancing Queen," 1976
EMF, "Unbelievable," 1991
SWV, "Weak," 1993
TLC, "Creep," "Waterfalls," 1995; "No Scrubs," "Unpretty," 1999
D4L, "Laffy Taffy," 2006
LMFAO, "Party Rock Anthem," 2011

LMFAO is additionally the first act to top the Hot 100 whose name represents internet slang. One such song has reigned: Usher's "OMG," featuring will.i.am.