Lady Gaga acted like a "fan girl" when she met Beck to collaborate on their song 'Dancin' In Circles'.
The track, which is on Gaga's forthcoming LP 'Joanne', was put together when the record's producer Mark Ronson bumped into the 46-year-old singer-songwriter and asked him to come into the studio.
The 'Uptown Funk' hitmaker says the star is the 30-year-old pop icon's "idol" and she couldn't control herself when they were in the same room.
Ronson, 41, said: "For Gaga, it was like meeting her idol. Beck is pretty much her favourite influential artist of the past 20 years. She was a fan girl at first."
Ronson and Gaga were late joined later by producer Bloodpop to finish the record - the follow-up to 2014's 'Artpop' - and Ronson has praised the US producer, real name Michael Tucker, for making sure the record didn't sound "retro".
Speaking to Rolling Stone magazine, he said: "We could have disappeared into our love for analog authenticity. But he came in and shook it up in a great way. He brought it into the modern era."
Bloodpop, who has worked with Justin Bieber in the past, clearly had a major influence on the final cut, as Ronson previously said the record was sounding "very analog".
During the early days, he said: "She [Gaga] is a muso at heart. She's happiest when she is sat at a piano barking orders and that side of her I don't think the world has seen it. It is great to make this very honest, authentic analog kind of record."
'Joanne' is released on Friday (21.10.16).