You know that Kanye West sings and Paul McCartney plays instruments on Rhianna's song "FourFiveSeconds." But did you know who else is on the song? Wilson Phillips.

Yes that Wilson Phillips; as in the 90's group made up of Carnie Wilson, Wendy Wilson and Chynna Phillips. As in the ending of Bridesmaids Wilson Phillips.

In an interview with Billboard Carnie Wilson says that Kanye, who co-wrote and produced the song, reached out to Wilson Phillips.

"He said 'When I think of authenticity and I think of angelic, I think of you,'" Wilson told Billboard.

Kanye played an early version of the song for the group and asked them to work up some harmonies for the song.

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

Watch the video below and see if you can pick out their vocals.

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