Lady Gaga cosied up to veteran EastEnders star June Brown and adjusted her dress as they shared a sofa.
The unlikely duo hit it off when they were both guests on the Graham Norton Show, with the chart-topping singer telling the 86-year-old: "You look amazing."
Gaga even helped herself to a slurp from the Dot Cotton star's glass of wine, declaring: "I want to drink from your cup to see what those genes are."
The pair both feature in this Friday's edition of the BBC1 show, with the Applause hitmaker leaning over to Brown and adjusting her outfit with pins from her own outlandish headgear, created from a plume of black feathers.
Gaga, renowned for her over-the-top outfits, performed in two costumes on the show - her feathered headpiece and a Marc Jacobs ensemble with sheer black top, as well as a skimpy costume with a seashell bra which made her look like Botticelli's Venus.
The singer told presenter Norton it was her experiments with fashion which keep her on track.
She said: "It's how I deal with my insanity. From when I was young I had voices in my head and for the longest time I was drinking and doing a lot of drugs and it was the clothing and the artistry that saved me. I get sheer joy out of creativity, it's like a psychedelic experience for me."
Brown said her own eye-catching dress, which showed off her legs, was an attempt to compete with Gaga, as she declared: "I had to outdo her."
Gaga claimed she was familiar with the actress's role in the Walford soap, telling her: "Actually I am a really big fan of yours. You are so fabulously dressed I am honoured to be sitting next to you."
The singer - who releases her fourth album Artpop next week - also revealed that she spoils Sir Elton John's two children in her role as godmother.
"I bring them presents all the time. I spoil the hell out of them. They are the most beautiful kids and I've never seen such a loving family. They are absolutely the symbol of the future modern family," she said.
Discussing the injury which led to world tour dates being cancelled earlier this year, Gaga said: "I broke my hip - and who dances on a broken hip for three months and doesn't know? The thing is when you are on a tour for that long, everything hurts and it's not a possibility to me to cancel. I can't say no and I can't stop. I felt dead not performing."
:: The Graham Norton Show is on Friday on BBC1 at 10.35pm.