British singer Geri Halliwell has been spicing up studio sessions by wearing just a bra while recording.

The former Spice Girls star took a photo of herself wearing lacy underwear while singing into the microphone and shared the snap with her thousands of followers on Twitter.com.

Halliwell then hinted at undressing even further, writing, "(I was) warned not to tweet this, but here goes... Hot in studio... 'apparently' Kate Bush took her bra off!"

The pop star is believed to be working on her fourth solo album, due out later this year (13), and it looks like the release could be her sauciest to date.

On Monday (14Jan13), she tweeted, "In studio... writing a song about spanking..."