Tina Turner is 77 today. "At 1:55, right after the chorus, Zappa plays a long guitar solo. Then, there's a complex middle section with vocals (performed by Tina Turner & The Ikettes, uncredited) backed by percussion, singing some of the verses. Zappa follows singing the last verses and finally there's the coda, where the line from the chorus ("Moving to Montana soon...," sung by Tina Turner and the Ikettes) is repeated constantly and answered by a high-pitched "Yippy-Aye-O-Ty-Ay" (sung by Kin Vassy). This goes on until it fades out towards the six-and-a-half minute mark.
Of the Ikettes' harmonies, Zappa later said:
It was so difficult, that one part in the middle of the song "Montana", that the three girls rehearsed it for a couple of days. Just that one section. You know the part that goes "I'm pluckin' the ol' dennil floss..."? Right in the middle there. And one of the harmony singers got it first. She came out and sang her part and the other girls had to follow her track. Tina was so pleased that she was able to sing this that she went into the next studio where Ike was working and dragged him into the studio to hear the result of her labour. He listened to the tape and he goes, "What is this shit?" and walked out"."