File photo shows Fergie from "Black Eyed Peas" arriving at the 49th Annual Grammy Awards in Los Angeles February 11, 2007. Fergie earned her second No. 1 on the Billboard Hot 100 singles chart Thursday with "Glamorous," a tune featuring rapper Ludacris. [Reuters/Mario Anzuon]

NEW YORK - Black Eyed Peas singer Fergie earned her second No. 1 on the Billboard Hot 100 singles chart Thursday with "Glamorous," a tune featuring rapper Ludacris.

Thanks to 166,000 digital downloads, the track jumped seven places to end the two-week reign of New York rapper Mims' "This Is Why I'm Hot," which slipped to No. 2.

In its nine week history on the Hot 100, "Glamorous" has fallen in and out of the top-10 due to its availability online. Fergie's first single, last year's "London Bridge," was her first No. 1 on the chart.

Fergie (a.k.a. Stacy Ferguson) becomes only the sixth solo female artist in the past 20 years to pull two or more Hot 100 No. 1 singles from a debut album, following Tiffany, Paula Abdul, Mariah Carey, Christina Aguilera and Beyonce.

Ludacris, meanwhile, has been to the top three other times: in 2003 with "Stand Up," featuring Shawna; in 2004 as the featured artist on "Yeah!" by Usher; and in 2006 with "Money Maker," featuring Pharrell.

Akon's "Don't Matter" slipped one to No. 3; the R&B singer is also the featured artist on Gwen Stefani's "The Sweet Escape," as it similarly fell one to No. 4.

Patrick Stump can be heard on the No. 5 and 6 tracks, as the featured artist on Gym Class Heroes' "Cupid's Chokehold" (up two to No. 5) and in his own band Fall Out Boy, whose "This Ain't a Scene, It's an Arms Race" held at No. 6 for a second week. Rock band Daughtry's "It's Not Over" re-entered the top-10, rising four to No. 7.

"What Goes Around. . . Comes Around" by Justin Timberlake dropped four to No. 8, while Avril Lavigne's "Girlfriend" was also down four, to No. 9. Former chart-topper "Say It Right" from Nelly Furtado kept the No. 10 spot warm for a second week.

Billy Currington's "Good Directions" was the biggest debut, bowing at No. 91. Another country star, youngster Taylor Swift, enters at No. 93 with "Teardrops on My Guitar."