Bieber takes top Twitter spot

(CNN){ } Justin Bieber surpassed fellow singer Lady Gaga Monday night to become the most-followed person on Twitter.{ } Both have more than 33-point-three million followers, but Bieber is just a little bit ahead of Gaga now.

Neither immediately acknowledged the milestone. Gaga held the top spot since August 2010, when she overtook another singer - Britney Spears.