who said i can't wear my converse with my dress

The phrase "Who said I can't wear my Converse with my dress?" is a lyric from the song "La La Land" by Demi Lovato. This line is used in the song to express individuality and confidence in breaking fashion norms. Thus, Demi Lovato said "I can't wear my Converse with my dress" as part of her song's lyrics.