The pop divas recently unveiled the visual for their new collaboration, 'Black Widow', which is a spoof of Quentin Tarantino's 'Kill Bill' movies, and the 23-year-old star felt inspired after working with Iggy, who is known for her elaborate videos.
She said: "Iggy is just so involved in her videos. She really is involved. So I learned a lot from that.
"She got inspiration from old Korean ninja things and 'Kill Bill' and then I got inspired by the leather catsuits. I watched 'Kill Bill' like three times. I learned a lot and we just had fun."
Rita thoroughly enjoyed working with the Australian rapper, who previously supported her on her UK tour, and says there was no female rivalry between the pair.
She told Capital FM: "It was so nice to have no competition vibes. We have so many different ambitions but we work well together, really well."
Rita is currently working on her second studio album - which is due for release later this year - and the record will see her open up about her headline-making personal life.
She teased: "This [new] album's the most honest I've ever been and I think all these headlines and all these stories, it will all make sense soon."