Well, it's a good piece of inspiration, but I can't see the whole "smart" reference, with your drawing style. The effect of colouring outside of the lines looks messy and if you're not going to change that, perhaps consider removing the lines altogether, as this would make it look a lot better. Look at leaving some of the lines for shading though, as they do confer a benefit.
The background could have been a different colour here, as there is just a little too much yellow here - go for something like turquoise, to give contrast and allowing the flowers on the shoulders to show up more.
Finally, a little attention to detail, with things like the glasses, which just have to be perfect, in my opinion, would be brilliant.
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