Lady Gaga has become the first user to reach 15 million followers on Twitter, accumulating her latest million, whom she refers to as her Little Monsters, in just 28 days.

This is a new personal best for Gaga – her previous record was adding one million new followers in 31 days between July and August of this year.

At her current speed, Gaga should reach 16 million followers by November 27, and 20 million between March and April 2012.

Back in May, Lady Gaga became the first Twitter user to reach 10 million followers.

Gaga, who is currently in India, celebrated reaching 15 million in her usual style.

Gaga’s closest competitor on Twitter is Canadian teeny bopper Justin Bieber, who after narrowing the gap to almost half a million back in April, is now well over a million followers behind.

(Chart credit: Twitter Counter.)