The glamour model left the house after receiving the fewest votes from the public.
Steps singer Claire Richards, The Hills couple Heidi Montag and Spencer Pratt and X Factor star Rylan Clark survived the eviction.
Lacey left the house to a mainly positive reaction after the crowd spent most of the evening chanting for Speidi to leave.
She recently clashed with Heidi after stripping naked in front of her to shower.
Former Coronation Street actor Sam Robertson and model Paula Hamilton were the first two housemates to be evicted from Celebrity Big Brother.
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