First the former Blue band singer was seen snuggling up to American model Jasmine in the treehouse while later they were seen getting comfy sharing a bed together in the bedroom.
Sneaking before entering the house earlier this month, Lee claimed that getting into a relationship on a reality show would be "tacky".
“How unclassy or tacky for me to go in there and pull a bird,” Lee told new! magazine “I’m not going to be walking around all horny looking at them. I got over that stage when I was about 13, 14.”
Elsewhere in tonight's show and Sam confides in Casey while Dappy, Lionel Blair and Ollie Locke swap dance moves in the garden.
Celebrity Big Brother airs tonight at 9PM on Channel 5.