CBB viewers tonight saw Lillie entering the house before fronting up Bear about his relationship with Chloe Khan, who was evicted last week.
Lillie had been in a relationship with Bear when he entered this series, but he ditched her on TV before hooking up with fellow contestant Chloe.
Taking to Twitter, many celeb fans have offered their support to Lillie.
Luisa Zissman said: "That poor girl. And bear just shrugged at her, I would have punched him when he did that. He's an ass hole. #CBB."
Love Island's Kady McDermott added: "In tears watching @LillieGregg you deserve 100 times better beautiful girl."
Even This Morning's Eamonn Holmes asked his followers: "After his poor ex girlfriend appearing , Did #Bear get your sympathy vote at all? #CBB # #CBBBear." He was met with an overwhelming no...
Former CBB star James Jordan told his fans: "I don't feel sorry for Bear..... Not even 1 per cent. But I am glad to see he has weaknesses and a heart in there somewhere #CBB @bbuk."
While Big Brother's Lateysha Grace tweeted: "What a coward not saying a word. #cbb #bear."
Lillie is yet to comment on her appearance, however she has retweeted her agent who simply wrote: "CBB wow."
Tonight, Lillie entered the house as a 'distraction' while Bear, Renee Graziano and Sam Fox all stood with three doughnuts on their heads.
She tearfully told him: "This is the hardest thing I've ever had to do, I just needed to see you… it's so surreal… I'm having to watch this from home. You had me with you until the car came to collect you; you left me with your family. You asked me to be there when you got home, I was supporting you 100 per cent. The embarrassment and humiliation I've had… this is all one big game to you, it is a joke at my expense."
Following her appearance, the CBB housemates all rallied round and hugged her, while Bear silently stared at the floor.
He then went to the Diary Room and cried, telling Big Brother: "In the long run, she would've got hurt a lot more. I had to break away from her, it's the hardest thing I had to do. I would've married her."
CBB continues at 9pm on Channel 5.
Fancy winning some GREAT prizes? Check out Reveal Competitions here!