Chart notes

• Britney Spears' "Gimme More" surges up the Billboard Hot 100 this week, advancing 65 spots to land at #3, making the single her second highest charting ever after her 1999 #1 hit "...Baby One More Time." This is Britney's fifth top 10 hit, following "...Baby...," "(You Drive Me) Crazy," "Oops!...I Did It Again," and "Toxic." The big surge is undoubtedly attributed to the single going on sale last week at iTunes, as its airplay has plateaued of late. Over on the R&R Top 40, for example, the song holds at #18 despite having climbed rather rapidly over the previous weeks.

• Two other singles make big jumps into the top 10. Up 16 at #6 is the third recent top 10 for Timbaland, this time featuring OneRepublic on the ballad "Apologize." His last single, the upbeat "The Way I Are" with Keri Hilson and DOE is still in the top 10, down one place this week at #4. Timbaland hit #1 earlier this year with "Give It To Me (feat. Justin Timberlake & Nelly Furtado)." The other big climber is Feist with "1,2,3,4," which moves up 20 places to #8. The single has been getting VH1 play for awhile, but got a big boost with the prominent feature of the song in the new Apple iPod Nano ad campaign.