What to wear?!?!

So we're plannign on having our annual New Year's Eve bash that we have been habving for the past 3 years. This time it's going to be more of a buisness venture for the bf and I and I'll have to work more than I can party but I'm alright with that as long as he's next to me at Midnight. Since we're doing all this planning already I thought I would start looking for an outfit and usually I wear something sparking and "noticeable" for New Years and since I'm going to be "working" this night I kinda wanna wear a dress, something similar to the three below, that purple one is from missselfridge.com actually for only $70, Not bad at all if you ask me. I'm completely dedicated to the gym so hopefully by mid-decemebr I can be bangin in somethin cute! ;)