Manager invites stars to Bieber's surprise birthday party

Kim Kardashian and Mike Tyson were among the guests at Justin Bieber's surprise birthday party on Friday.

The 'Baby' hitmaker turned 18 on Thursday and celebrated reaching the milestone age at a bash thrown by his manager Scooter Braun and mother Patti Mallette at the Beverly Wilshire Hotel, where guests also included his girlfriend Selena Gomez - who jetted in from Florida, where she has been filming 'Spring Breakers', for the occasion - Kylie and Kendall Jenner and Ashley Tisdale.