Margot Robbie would love to make a ‘Barbie’ musical. The 33-year-old actress starred in the ‘Barbie’ movie in 2023, and she’s already discussed the possibility of making a “big, crazy musical” with director Greta Gerwig. Asked about the possibility of making a ‘Barbie’ musical, Margot told ‘Entertainment Tonight’: “Trust me, this isn’t the first … this is not the first time we’ve thought of it, yeah. “It’s so fun when you can turn everything into a big, crazy musical number. Everything is infinitely more fun.” Greta, 40, is also keen on the idea of making a musical. The director actually adm…