Miley Cyrus wears this Nutmeg cut out Polka front bow dress from The Reformation. Unfortunately it is sold out in the polka dot one she's wearing, here's the exact dress in a plain black colour

Demi Lovato wears this very cute topshop Sheer Sleeved Playsuit on Xfactor US

You can buy this HERE from Topshop for $96. Be quick it's low in stock!

You can buy a similar one, Finderskeepers Buckets of Rain Playsuit HERE for $135 from Shopbop
or this ASOS Shirt Detail Playsuit HERE for $42

Cymphonique Millers wears this pink pleated romper with black buttons and a lace peter pan collar as Kacey Simon on the Nickelodeon TV Series How to Rock. It was really hard to find any similar for this romper so I tried to find dresses as well

The dress in this picture, b + ab Contrast Collar Dress HERE from ASOS for $170.
The most similar i could find is this, Marc by Marc Jacobs Blythe Double Wool Romper HERE from Shopbop for $298
Finders Keepers Let It Rain Playsuit HERE for $100 from Shopbop
Semi-Sheer Pintucked Dress HERE from Forever21 for $22.90

This is a Casual but nice appropriate clothing for a date I tried to make this outfit as appropriate as i could without knowing specifically what even. And is appropriate for a teenager. I tried to find all the clothing items under $50 with the exception of the shoes and jacket.

Peter Pan Collar Shirt HERE for £24.99 or similar beige tshirt with black collar HERE for $51

High Waisted skirt HERE for $30 or a similar one HERE from Topshop for $26
Floral Vans HERE for $55 or Similar blue ones HERE
Navy Blouse HERE for $47
Leggings HERE for $68 from Urban Outfitters or Similar panel leather HERE for $49
Studded Boots HERE $475
Fringe Jacket HERE for $47
Cute Red Dress HERE
Black Vans HERE for $45