The Hold On hitmakers can be heard harmonising on the bridge of West's collaboration with Rihanna and Sir Paul MCCartney and Carnie admits the girls had an easy time working with West.

She tells, "He was really shy and he would just smile and he’s real soft-spoken, then all of a sudden, when he started playing all these songs, he was dancing around the room. It was just like how Michael Jackson used to be. When he would press play, it was like, out came the artist and the creativity was just really there.

"We didn’t know if we were singing on a section of the song - originally it was supposed to be just the bridge. He gave us sole freedom to just do what we do. We just went in there and let loose."

Wilson hopes West takes heed of FourFiveSeconds co-producer Kuk Harrell's suggestion to work with Wilson Phillips again as the trio make plans for a sixth album: "I would love to see what he (West) would have in mind because he thinks outside the box."