Justin Bieber Amasses 25 Million Followers on Twitter (PHOTOS)

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Congratulations are in order for Justin Bieber — the 18-year-old pop phenom just hit another major Twitter milestone.

The “Believe” singer finally crossed over the 25 million follower threshold Monday on the popular social networking site. During the last two years, Bieber’s extreme popularity on the site prompted a revision to Twitter’s algorithm so his name wouldn’t fixed staple on it’s top trending topics list.

The only other celebrity to have amassed more followers than the Biebs is Lady Gaga, who has over 27 million followers as of this posting.

What was the last thing he tweeted before hitting the big 2-5 million?

Bieber sent out a promo for his many upcoming Australian appearances. Most notably, he’ll perform on the finale of Australia’s Got Talent.

Though this is exciting news for Bieber, he’s been experiencing his fair share of drama while down under.

During filming of his performance on Australia’s Got Talent, Bieber sprained his ankle and was trampled by an overenthusiastic fan.

Following the drama, his girlfriend of just over a year and a half, Selena Gomez, joined him in Australia to enjoy a romantic date night.

What do you think of Bieber’s latest achievement? Sound off in the comments.

For more secrets from the Biebs, watch below.

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