When they remake Dirty Dancing, (Lionsgate Films, due 2014) Katy Perry would be a great pick for Baby's sister. The current Queen of Pop (Katy sells more than anybody right now. Neither Gaga, nor Adele, nor Kelly is more popular in terms of dollars) might not want to play a supporting role, but if she did and the makers of the film wanted to recreate the look of the original, Katy would be a great choice to reprise Jane Brucker's role.

Their voices are even somewhat similar. Katy is obviously a world class talent, but I hear something there.