If you're going to tweet about the premiere of the '3' video, use the hashtag #britney3premiere - hopefully this will make the trending topics!

What's a hashtag? What's a trending topic? On Twitter, the most talked about topics of that moment, called "Trending Topics," appear in the bar on the right hand side, right under your follower count and the search box. By using a hashtag, or one common term that starts with a # symbol, all the tweets about one subject count towards making that hastag a Trending Topic. You can also click on a hashtag to see all the other tweets also containing that hashtag.

The 3-day countdown to the "3" video premiere has begun! Here's the deal: During the next 3 days, Britney will launch her video through pictures and video clips, culminating with the "3" video "Premiere Tweet" on Day 3 -- Friday, Oct. 30. Are you in?

Day 1: Photo Release
Three never-before-seen photos from the final "3" video will be released via Britney's official Twitter today -- one photo will be sent out every 3 hours. Triple fun that way.

Day 2: Video Teaser Release
We will release three 5-second clips of the "3" video starting tomorrow morning -- one clip will be sent out every 3 hours via Britney's Twitter. 

Day 3: 3-Day
On Friday, Oct. 30, Britney will Tweet the link of the video premiere for your viewing pleasure. Livin' in sin is the new thing.

1...2...3 days until the premier of my new video but don't stress, I will be sending out lots of pics and clips for the next 3 days. - Brit

Here's the first: 

Working on the 3 video guys!  Almost there. Stay tuned.....  -Adam, manager

Sadly, '3' has fallen to #5 on the Billboard Hot 100 after its #1 debut last week.  And while digital sales have fallen, radio airplay of ''3' is up 44%, moving from 49 to 25 on the Hot 100 Airplay chart.

3 is still all over the Billboard charts, appearing at:
#5 Hot 100
#14 Pop Songs
#25 Radio Songs
#1 Digital Songs
#54 European Hot 100
#2 Canadian Hot 100