The Independent Police Complaints Commission says it will investigate South Wales Police's investigation into Ian Watkins, singer with Welsh rock group Lostprophets.
We received a referral from South Wales Police on 25th January 2013 relating to Ian Watkins. Following a thorough assessment I have decided that we will carry out an independent investigation.
As criminal proceedings are active, it would be inappropriate to publish further information at this time.”
Mr Watkins, 35, is charged with conspiring to rape a child and possessing and distribution of indecent images of children.
He is due to make a further court appearance in March.