The Grammy-winner singer is currently in India to perform at the inaugural ceremony of Formula One race in New Dehli.
“I am finally here + what a dream come true. Performing at Formula 1 in India, and my first day here I reached #15millionmonsters,” the pop singer tweeted on Oct. 27.
Adding one million followers in just 28 days beats her old personal best, according to AllTwitter: Gaga previously added one million followers in 31 days between July 2011 and August 2011. At this rate, the site projects she should reach 20 million followers between March 2012 and April 2012.