This is a little over budget at 129. However, it SCREAMS gala, and it comes in plus sizes!!!

[This](Angel-fashions Women's Asymmetric Ribbon Gradient Sequin Mermaid Long Prom Dress (XXL, Pink Silver) https://www.amazon.com/dp/B07CP5DV4F/ref=cm_sw_r_cp_api_n.rqBbGNKJ9QM) is in your budget at 74.99 and screams MLP to me!

[This has 15.99 shipping](VICKYBEN Women's A-Line Tulle Prom Formal Evening Homecoming Dress Ball Gown (18w, Burgundy) https://www.amazon.com/dp/B0787NMST4/ref=cm_sw_r_cp_api_GasqBbVPB37YW) but also comes under your budget with the price of 59 before shipping!