Trina Vega (Daniella Monet) wears this blue button front mini dress in this episode of Victorious.

You can buy it in the following:
Black and White Patterned HERE for $242
Baby Pink HERE for $169
Aztecy Pink, Red and White HERE for $169
Navy blue HERE for $121
Green HERE for $146

If you like the style of this dress, I recommend you check out the
Parker Wrap Dress