I Kissed A Girl singer Katy Perry gets plastered on MTV

Famously uninhibited star Katy Perry remained true to form during her latest television appearance.

The I Kissed A Girl singer stripped off to have a plaster cast made of her 32DD bust in front of MTV's television cameras.

Getting plastered: Katy Perry had a cast made of her 32DD breasts on MTV

But it was all for a good cause - the mold will be sold to raise funds for breast cancer research on website Keep-A-Breast.org.

The 23-year-old, who's antics include leaping of into the crowd at a gig to kiss a 16-year-old lesbian fan, is still at the top of the charts for the fourth week in a row with her worldwide hit.

Katy, who was raised in a strict religious household in Santa Barbara, she insists she's not your average bubblegum pop starlet.

She says: 'Pop stars are hard to relate to because they're afraid people will exploit their flaws. I, on the other hand, celebrate my flaws.'

Good cause: The mold will be sold to raise money for a breast cancer charity