Mel, who is mum to Scarlet, two, told the Mirror she believes someone in Rihanna's position, who has an army of young fans, is too sexual in her performances.
'People have to take some responsibility because we've got to a point where over-sexualisation of young children has gone too far,' said Mel.
'I think music is a big part of that. Women in music, very successful women, are extremely sexual and they have young fans. It is inappropriate. Rihanna has responsibility and although culture's always changing, it's changed too much. It needs to be dealt with. It's reached saturation point, we owe it to our kids to protect them.
'Rihanna's free to do as she pleases, of course, but I think her take on the criticism she's had is interesting.'
Former Sporty Spice the went on to say Rihanna might not understand where she's coming from with her comments, because she's not a mother herself:
'I love Rihanna, I think she's a f****** brilliant artist, with great songs, a great record and she looks fantastic... but she's not a mum. Maybe if she becomes one she'll feel different. I hope so anyway.'
Do you think popstars are too sexy for young fans? Have you ever had to explain raunchy behaviour to your young children?