Confound these ponies, they drive me to design girly dresses.  
(It doesn’t help that RD’s dress is Greek themed, which only made me want to draw it more. Insert obligatory RD is best pony here )
 
Because my muse refused to shut up after watching Best Night Ever/ Suited for Success, have a human Rainbow Dash Gala dress.  
I went along with the Greek theme and based her after the Greek goddess of messages and the rainbow, Iris, who also had wings and a rainbow colored robe.
 
I usually have human RD with wings, but I forgot to draw those in. Oh well.  
My sister remarked that Rainbow looked too girly, but I say just because RD’s a tomboy doesn’t mean she can’t look pretty.
 
(Ignore the bowlegs, it’s like the only thing I always have trouble drawing right. )
 
MLP:FiM belongs to Hasbro