The last Celebrity Big Brother winner took a swipe at Emma for not being kind to him after he won last summer's show.
"I see Emma Willis is back," Bear tweeted during last night's episode. “Let’s hope she’s kinder to the winner this year.
"Took me 3 months of rehab to get over it.”
He went on to say it was a "liberty !" to not be back in the house as part of the All Star line up.
Heavy D, who appeared on the series alongside Bear, chimed in: "I was treated exactly the same! Without me or you there last time that house would have been s**t!"
Emma and Bear clashed during the final of last year's series when she took him to task over his behaviour in the house.
Bear later complained: “I think she is angry that I won, probably. Maybe because I was the underdog and people wanted me to succeed.”
At least Emma knows she has some fans on the line up this year with 'All Star' Nicola McLean happy to see her in last night's live show.
On entering the house, Emma asked Nicola why she was joining the show again having complained of her previous experience.
The question prompted Nicola to reply by saying that former host Brian Dowling was "crap" and had treated her unfairly after her eviction in 2012.
Emma, who replaced Brian, looked on awkwardly before sending Nicola into the house.
Celebrity Big Brother 2017 continues nightly on Channel 5.