Britney Spears cross 5 Million Followers on Twitter

Britney Spears has become the first person to break the 5 million follower’s wall on Twitter, less than a week after passing Ashton Kutcher to become the social networking site's most popular account user.

The star celebrated becoming No. 1 earlier this week by taking fan questions, revealing that her favorite of her own songs is "Toxic," her desert island necessities are her "boots, water and my CD collection," and she'd love to duet with British singer Robbie Williams.

As of Saturday afternoon, Britney had 5,015,346 followers, with Ashton trailing at 4,982,734. Notably, Ashton does his own Tweeting, while Britney's account is a mix of the star's posts and ones from her team and management.

Among her pop world competitors, Brit has nearly 800,000 followers more than Lady Gaga, who reached a landmark of her own this year by notching over a billion YouTube views of her music videos - a record.

Meanwhile, rocker John Mayer, once a prolific Tweeter, has cooled off on the site, Tweeting just once so far during the month of May.

He noticeably cut back on Tweets earlier this year, following a headline-garnering interview in Playboy.