'CLIMB' COMPLETED: Miley Cyrus has spent the second half of the 2000s topping various Billboard album charts. This week, she notches her first No. 1 on the Adult Contemporary radio airplay survey.

"The Climb" ascends 2-1, pushing fellow teen Taylor Swift to No. 2 after a six-week reign with "Love Story."

Cyrus has earned two No. 1s on the Billboard 200: "Hannah Montana 2 Soundtrack/Meet Miley Cyrus" in 2007 and "Breakout" last August. Her on-screen alter ego has produced two additional leaders: the "Hannah Montana" television soundtrack in 2006 and "Hannah Montana: The Movie," which bowed atop the chart in May.

Among other airplay charts, Cyrus has climbed as high as No. 4 on Hot Country Songs with "Ready, Set, Don't Go," with dad Billy Ray, in April 2008. She reached the same highwater mark on the Mainstream Top 40 chart two months later with "See You Again."

At 16 years and seven months, Cyrus is the youngest artist to top Adult Contemporary since LeAnn Rimes entered the penthouse with "How Do I Live" in September 1997 just two weeks after her 15th birthday.

1OH!1: Boulder, Colorado's 3OH!3, named after the duo's hometown area code, conquers the Mainstream Top 40 chart, as its maiden entry, "Don't Trust Me," rises 2-1.

The song's coronation lifts the pair into exclusive company. 3OH!3 is just the eighth lead group or duo this decade to top the tally in its first chart appearance. Here is a look at the groups to make such grand entrances since 2000:

3OH!3, "Don't Trust Me," 2009
Daughtry, "It's Not Over," 2007
Hinder, "Lips of an Angel," 2006
D.H.T., "Listen to Your Heart," 2005
Evanescence featuring Paul McCoy, "Bring Me to Life," 2003
Linkin Park, "In the End," 2001
Nickelback, "How You Remind Me," 2001
3 Doors Down, "Kryptonite," 2000

3OH!3 is also the latest chart-topping act on Mainstream Top 40 to sport a numeral in its name. The other lead acts whose numbers have come up at No. 1? UB40, All-4-One, Lisa Loeb & Nine Stories, Boyz II Men, Sixpence None the Richer, matchbox twenty, Nine Days, 3 Doors Down, 50 Cent and Maroon 5.

An honorary mention goes to the band who reigned with "Semi-Charmed Life" in 1997: Third Eye Blind.

UNCHAINED: Alice in Chains previews its first studio album in 14 years, as lead track "A Looking in View" bows on the Mainstream Rock airplay chart at No. 33. The song is the Seattle act's first entry since a live version of its introductory track "Man in the Box" ranked at No. 40 on the chart dated Jan. 6, 2001.

The band is certainly different than the one that placed 19 prior titles, including its sole No. 1, "No Excuses," on the chart beginning in 1991. Former lead singer Layne Staley passed away from substance abuse in 2002.

"Black Gives Way to Blue," the act's first album featuring vocalist William DuVall, is due Sept. 29.

COMPLETE BEAT: Check back tomorrow when we run down feats from among all our charts, including Top Comprehensive Albums and Top Pop Catalog, where the King of Pop continues his posthumous reigns. On the Billboard Hot 100, Colbie Caillat previews her sophomore album with a lofty debut for "Falling for You." Her second collection, "Breakthrough," is due Aug. 25.

Questions? Comments? Let us know: @billboard

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