Rihanna's "Umbrella" begins a seventh week at No. 1 on the Billboard Hot 100, having successfully fended off Shop Boyz' "Party Like a Rockstar," which drops from No. 2 to No. 4.

The reigning single's newest competitor is Plain White T's' "Hey There Delilah," which inches up from third position to No. 2. Fergie's "Big Girls Don't Cry" is also climbing on the Hot 100, from No. 4 to No. 3.

T-Pain's "Buy U a Drank (Shawty Snappin')" holds at No. 5, while another of his songs, "Bartender" featuring Akon, jumps from No. 14 to No. 10. T-Pain thus becomes the first lead artist with two simultaneous Hot 100 top 10 hits since Akon in late January.

Timbaland's "The Way I Are" featuring Keri Hilson holds at No. 6, as does Maroon 5's "Makes Me Wonder" at No. 7. Hurricane Chris' "A Bay Bay" continues to rise, moving from No. 13 to No. 8, and T.I.'s "Big Things Poppin' (Do It)" jumps two positions to No. 9, in tandem with Wednesday's No. 1 Billboard 200 debut for his latest Grand Hustle/Atlantic album, "T.I. vs. T.I.P."

After previously peaking at No. 7, Linkin Park's "What I've Done" rebounds from the 24th slot to No. 14 as the chart's greatest digital gainer.

T.I. has the Hot 100's top debut with the Wyclef Jean collaboration "You Know What It Is" at No. 68. Also new is Justin Timberlake's "Lovestoned" at No. 85 and the Goo Goo Dolls' "Before It's Too Late (Sam and Mikaela's Theme) at No. 86.

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