Pop sensation Justin Bieber has beaten Lady Gaga to having the most watched video on YouTube.

Gaga's "Bad Romance" has been locked in a battle with the 16-year-old's 'Baby', which is currently ahead by 300,000 views.

The surge in Bieber's YouTube hits has dethroned Gaga's once most-watched clip.

It was recently announced that Bieber's life story is to be transformed into a comic book.