The US star, 26, jetted into the UK in time for New Year's Eve but the exact reason for her visit is being kept hush hush - sparking the whispers.
Lindsay, who is known for creating headlines wherever she goes, has been pictured arriving at London's Dorchester Hotel, but she was remaining tight-lipped.
The X Factor's Rylan Clark is also said to be taking part in this series, along with Steps star Claire Richards and former EastEnder Gillian Taylforth.
Why not scroll through our gallery below to see all the rumoured faces apparently heading inside tomorrow night!
Celebrity Big Brother, 9pm, C5, Thursday 3 January 2013.
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