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POPULAR TOPICS BY THE MINUTE, DAY, AND WEEK 
- #musicmondayA meme for tweeting what you're listening to each Monday.
- #MMThe shorter tag for #musicmonday, where people tweet about their current tunes.
- ThanksgivingIn the United States, people give thanks on the fourth Thursday in November (in 2009, the 26th). People are tweeting their holiday plans, which traditionally include turkey.
- New MoonNew Moon, the second Twilight movie, was released to theaters Nov. 20.
- #aintnothinglike
- Adam LambertAdam Lambert performed his debut single, "For Your Entertainment," last night (Nov. 22) at the American Music Awards.
- Google WaveEvery one still wants invites to the beta for Google's new communication/collaboration tool.
- Black FridayThe day after Thanksgiving (in the United States) is a huge shopping day, since the next holiday for many people is Christmas, which involves lots of gift giving. People are tweeting about the sales they hope to take advantage of.
- #openwebawards@mashable's 3rd Annual Open Web Awards, Social Media Edition. Voting on the 5 top nominations in each category takes place Nov. 18 - Dec. 13. Winners to be announced Dec. 15.
- AMAsThe American Music Awards were on last night (Nov. 22).
- New MoonNew Moon, the second Twilight movie, was released to theaters Nov. 20.
- #questionyouhatePeople tweeting the most irritating questions.
- #youknowyouinloveAnother hashtag about signs that indicate you're in love.
- ThanksgivingIn the United States, people give thanks on the fourth Thursday in November (in 2009, the 26th). People are tweeting their holiday plans, which traditionally include turkey.
- #answeryouhate
- #iswearithurts
- #intwitterhighschool
- #aintnothinglike
- Jedward
- UFC 106
- SNL
- Senate
- New MoonNew Moon, the second Twilight movie, was released to theaters Nov. 20.
- #theresway2many
- #youmightbealiberal
- #whatsbetterPeople are tweeting a choice between one thing and another.
- #musicmondayA meme for tweeting what you're listening to each Monday.
- #justbecauseIf one thing is true, it doesn't mean other things can't be true.
- #questionyouhatePeople tweeting the most irritating questions.
- Jedward
- #whatdoyoudoPeople are asking, sometimes rhetorically, what should be done in different situations.
- #nottosayonfirstdatePeople are tweeting things you shouldn't say when making a first impression with a new romantic interest.
- #blackthoughtsThe title of Young Money rapper Tyga's new mixtape, which releases today (Nov. 18). People are tweeting thoughts they consider "black."
- Twilight New MoonThe movie will be out in theaters on Nov 20. The red carpet premiere is in LA on Nov 16.