Now that she's a mother, Melanie Chisholm -- you know her as Sporty Spice of the Spice Girls -- is calling out Rihanna for being too sexy and provocative.

"Women in music, very successful women, are extremely sexual and they have young fans. It is inappropriate," Mel C told The Mirror. "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."

The comments are a bit surprising since the Spice Girls also faced similar criticism in their day, which Mel acknowledges: "It’s a long time ago since the Spice Girls were first together and we were criticized for being sexual. Yes, we wore crop tops. I mean, look how much has changed. But we always sat down as a group, be it in photoshoots, videos, interviews, and if somebody felt ­something was ­inappropriate for our young fans, we did something about it."

Chisholm respects Rihanna but hopes she'll change up her style if she ever becomes a parent: "I love Rihanna, I think she’s a f-----g brilliant artist, with great songs, a great record and she looks fantastic, but she’s not a mom. Maybe if she becomes one she’ll feel different. I hope so, anyway."

Melanie was the last of the Spice Girls to become a mother. Her daughter Scarlet Starr was born in February 2009.