The application gives BlackBerry users the ability to receive updates and send messages in real time, as well as upload photographs to their profile.
Since the application's launch on November 13, users have sent and received more than 15m messages and updated their mood and status over 2m times.
Chris DeWolfe, co-founder and chief executive officer of MySpace, said: "We established an innovative and collaborative partnership with RIM to address a key desire of consumers to have greater mobile connectivity and interaction with their friends and the global community at large.
"This record shows just how much of a force in the mobile consumer space RIM and MySpace have become."
The application includes a full messaging interface, including comments, bulletins and instant messaging, friend requests, notifications and camera integration and optimized photo management, allowing users to snap and upload to their profiles easily.
Jim Balsillie, co-chief executive officer at Research In Motion, said: "This powerful new mobile application combines social networking and mobility in a highly personalized and empowering manner and we are very excited to see such a positive response in the first week."