ASX-listed entertainment app firm MSM has launched its global talent competition, Megastar, in Australia and US over the weekend.

The company, which has pop superstar Usher on board as celebrity judge and Chief Creative Officer, said it had a total audience reach of over 130 million social media followers and its million-dollar competition has kicked off successfully.

The way the competition works is fans are in charge of who rises and falls through voting with their mobile phone, across categories including Music, Dance, Sport, Extreme, Comedy, Magic and Variety. Auditions are already running across South Africa, the UK, New Zealand and Canada.

The five-week competition will culminate with a grand finale on December 14, 2017, with one performer awarded a $US1 million prize.