Britney Spears’ Femme Fatale Twitter Trend Keeps Rolling

Title of pop star's March 29 release is #10 longest-running trend on social-networking site.

[artist id="501686"]Britney Spears[/artist]‘ upcoming album, Femme Fatale, doesn’t hit shelves until March 29, but it’s already breaking records.

The title, which has been trending worldwide on Twitter since Spears first announced it exactly a week ago, just nabbed the #10 spot on a list of the longest running Twitter trends gathered by Twend.It, a site that tracks topics on the social-networking site.

“Can’t believe Femme Fatale has been trending 6 days. You guys are my motivation every single day. I love u all!” Spears wrote Tuesday on Twitter, where she has more than 6.8 million followers; she also included a link to the official announcement on her site.

The top 10 list uses Twitter’s algorithms to tally the number of times a topic has trended since May 2010, when Twend.It was founded.

“It’s culturally important,” said Nick DiFilippo, co-founder of Twend.it, who added that the popularity of entertainment topics on Twitter validates the notion that social-networking is an effective advertising tool that allows artists to reach their fans more directly. “They are finding a way to connect with their fanbase.”

The ranking puts Spears in good company: Femme Fatale, the only music-related Twitter trend to break the top 10, joins “Inception,” which is holding strong at #1 after trending for a total of 39 days. “Inception” was one of 2010′s biggest box-office hits , grossing nearly $292 million domestically.

Of course, success on Twitter doesn’t always lead to great sales. Other pop culture strongholds on the list include the movies “Last Airbender” at #9, and “Scott Pilgrim,” positioned at #5. Both films disappointed at the box office.

Also noticeably absent from the list are Justin Bieber and Lady Gaga, both of whom were among the top five most-tweeted-about people in 2010. So while Bieber and Gaga each have strong followings on Twitter, Twend.it’s DiFilippo doesn’t think Spears is in danger of being pushed out of the top 10. In fact, he predicts Femme Fatale will quickly move up on the list.

“The way these trends go is once they hit momentum it gets hard to stop them,” he said. “Something like an album releasing, especially by one of the biggest pop artists around, it’s going to have some momentum, so I do predict it’s going to go a bit higher. I could see it going up to the sixth, fifth place at least.”

While the album doesn’t come out until next month, Britney fans have plenty to look forward to: The pop star has been tweeting daily teasers to her upcoming video for “Hold It Against Me,” which premieres on MTV on February 17 at 9:56 p.m. ET.