Watch: Shelley Craft makes bold Auction Day prediction - and reveals whether Kylie and Brad's early exit will have an impact

It is almost The Block Auction Day and co-host Shelley Craft is expecting "one last giant loop-de-loop" on the wild rollercoaster that has been Season 20.

In an interview on Today Extra, Shell admitted that while most of The Block was wracked with nerves she believed all five homes will sell at auction – but it's bound to be just as chaotic as the rest of the season.

Stream every episode ever of The Block for free on 9Now.

"Just hang on everybody, hang on for the ride and help us to the end," she shared.

Shelley revealed who she was rooting for on the big day – and answered the all important question of whether Kylie and Brad's exit would impact House 4's performance at the Auction.

See who Shelley is rooting for in the video above.

READ MORE: Kylie flees site after fiery clash with Scott Cam

"I think if you want a piece of The Block, if you want to live here on Phillip Island or just have it as your holiday home there are five magnificent homes up for Auction.

"This is the ultimate holiday pad, so I think whether you love them or hate them, and I say that for any of the couples, the hammers will drop tomorrow."

View gallery

In pictures: Kylie and Brad's completed house

Shell also revealed her favourite room of the season – and her choice may surprise you.

Watch her full interview in the video below.

READ MORE: Major 5-day beauty sale slashing 50% off everything

The Block's Grand Finale Auction Day will take place Sunday at 7:00pm on Channel 9 and 9Now.

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Stream every episode ever of The Block for free on 9Now.