Michelle Bridges munches on dirt in bizarre new ad

Michelle Bridges seems to be experiencing some strange pregnancy cravings.

Watch the Woolworths commercial above to see The Biggest Loser trainer rave on about healthy eating before chowing down on some questionably tasty dirt.

The 45-year-old, who is eight months pregnant, starred in the clip to spruik her new line of "nutritiously balanced frozen meals".

Michelle is expecting her first child with fellow TBL trainer Steve 'Commando' Willis.