Britney Spearsas the most followed person on Ashton Kutcher(now in third place) in May. As things stand now, GaGa has 5.7m followers; Britney has 5.6m; Ashton has 5.5m.

Lady GaGa is also the most popular living star on Michael Jacksonhas more – 18.9m at last count.

But GaGa’s reign may be fairly short-lived as Justin Bieber’s popularity is growing at a faster rate than the Poker Face star, and the Guardian reports that the teenager is on track to usurp her within six months.

It’s unlikely she is worried though – according to reports, GaGa’s Monster Ball arena tour is set to net the star $200m by the time it ends in April.

The tour began in November 2009 and since then, the star has extended her UK and US legs to meet unprecedented demand from her fans or, as she calls them, ‘little monsters’. The $200m the tour is set to make means that Lady GaGa is effectively one of the most successful female touring acts in history, reports Billboard.