Melanie Chisholm gropes TV presenter's butt

Melanie Chisholm showed off her cheeky side on U.K. TV on Friday (08Mar13) by groping a male presenter's butt as part of a charity challenge.

The former Spice Girls star is rallying her online followers to raise $80 each in aid of the Comic Relief organisation's Twitter Million event, and has gone head-to-head with celebrities including Lily Allen, Simon Pegg and Myleene Klass.

Melanie Chisholm, who completed a gruelling five-day boating trip along Africa's Zambezi river for the charity last month (Feb13), had promised her fans earlier this week (begs04Mar13) she would carry out a "cheeky" dare during a TV appearance on chat show This Morning in return for more donations - and on Friday she stayed true to her word.

The singer, wearing a Comic Relief trademark red nose, ran on during a segment presented by Welsh hunk Matt Johnson and felt his behind as she declared, "This is for the ladies of the nation - and some of the boys."

Matt Johnson turned the tables on Melanie Chisholm, quipping, "Now it's my turn, come here!" - prompting the pop star to rush off set.

The TV presenter is reportedly dating Les Miserables star Samantha Barks.