The question is not entirely rhetorical. As Sheila Weller's Girls Like Us, a lively history of femme popsters Carole King, Joni Mitchell and Carly Simon, is being adapted to the screen by John Sayles, I've been thinking of the dream cast for the bio-triptych about the women who blazed the path for the likes of Avril Lavigne, Beyonce and Katy Perry.
While Weller's dream Jonis are Amanda Seyfried (who sounded her golden pipes in Mamma Mia!), Michelle Williams and Jennifer Lawrence, Wood, who manages the trick of being ethereal and grounded, was Joni-like as the lead of Across the Universe and would be my first choice. (After seeing her Veda in Mildred Pierce, I am convinced she can do anything. Second would be Mia Wasikowska, but I don't know if she can sing and, as Weller said, she already played a character named after Joni Mitchell in The Kids Are All Right. Taylor Swift has the voice and the cheekbones that arch to the heavens,
For Carole King, Weller would like to see Lea Michelle, Carey Mulligan or Elisabeth Moss. Michelle or Moss are great, off-center choices for the woman who co-wrote "But Will You Love Me Tomorrow?" I can also see impish Emma Stone in the part.
As for Carly Simon, Weller suggests Mandy Moore, a good singer and a warm screen presence...or Mila Kunis, who might be more interesting as King.