The singer, who has teamed up with the Black Eyed Peas frontman and producer for her song 'Fall In Love', said that he was a "genius" in the studio.
Watch Ora discuss her new record below:
She told Digital Spy: "will.i.am is incredible. He's like a genius and he works so fast. I don't know how his brain is so like...
"He can do so many things at once and does it the best as well. He doesn't half-heartedly do anything. We did 'Fall In Love' in a day and night and then we went out and had a drink."
She continued: "He saves so much time how quick he works. If I could work that quick, I'd be over the moon!"
The star has also worked with rapper J Cole, producers The-Dream and Diplo as well as singer-songwriter Sira for her first LP, which is out next week (August 26).
Ora recently revealed that Beyoncé was like a big sister to her.
Watch the music video for her latest single 'How We Do (Party)' below: