That mark lasted nearly five years until Maroon 5 soared 64-1 with "Makes Me Wonder" in May 2007 and had been broken three more times since, most recently by Britney Spears' "Womanizer" (96-1).
"My Life" is Clarkson's first No. 1 since her debut single, though she has placed six other songs in the top 10 during this time, including the No. 2-peaking "Since U Been Gone" in April 2005.
Elsewhere on the Hot 100, Lady GaGa's "Just Dance" featuring Colby O'Donis slips to No. 2 after three weeks on top. Beyonce's "Single Ladies (Put a Ring on It)" slides 2-3, while Kanye West's "Heartless" is down 3-4 despite being the chart's greatest airplay gainer.
Taylor Swift's "Love Story" holds at No. 5, the All-American Rejects' "Gives You Hell" remains No. 6 and T.I.'s "Live Your Life" featuring Rihanna drops 4-7. The Fray's "You Found Me" jumps 16-8 as the top digital gainer on the Hot 100, thanks to download sales of 145,000. Britney Spears' "Circus" inches up 10-9 and Jason Mraz's "I'm Yours" is down 7-10.
The Hot 100's top debut comes from U2's "Get on Your Boots" at No. 37. The track sold 57,000 downloads and garnered enough airplay to debut at No. 8 on Billboard's Modern Rock chart and No. 29 on the Mainstream Rock tally.
On Hot R&B/Hip-Hop Songs, "Single Ladies" is in an 11th week at No. 1. Ciara's "Never Ever" featuring Young Jeezy is the top debut at No. 70; it's the second single from her delayed new album "Fantasy Ride," following "Go Girl" featuring T-Pain, which peaked at No. 26 last October.
Blake Shelton notches his fifth No. 1 on Hot Country Songs with "She Wouldn't Be Gone," which jumps 3-1. Rascal Flatts' "Here Comes Goodbye" is the top debut at No. 29, giving the group its second-highest bow. Its new album, "Unstoppable," is due April 7 from Lyric Street/Hollywood.
Kings Of Leon's "Sex on Fire" begins an eighth week atop the Modern Rock chart, while Shinedown leads Mainstream Rock for a seventh with "Second Chance."