A good jumpsuit is a definite closet must-have. Dressed up or down, this piece is always in style and so simple when you're crunched for time or looking to simplify your look.

Alessandra Ambrosio rocks this sleeveless romper over a simple black tee, paired with a waist-tied bomber jacket, leather sneakers and mirrored sunglasses. I love the original color palette and Alessandra's ASTARS 'Marching Orders' Jumpsuit ($129), but in this recreation I wanted to switch it up a bit with a more versatile black jumpsuit and slouchy gray tee.

Steal her Alessandra's style with my affordable picks below, including a look-a-like purple satin jacket from Topshop!

Kourtney Kardashian looked sporty chic in a fitted black turtleneck top, destroyed denim and black Vans 'Old Skool' Sneakers.

Her exact sneaks are just $60, making them a great celebrity style bargain - not to mention the perfect shoe for running all those last-minute holiday errands!

I love how versatile the turtleneck has proven itself to be this season, going from Chloe Sevigny's hipster look to Ariel Winter's casual glam outfit to Kourtney's edgy It-girl style.

If you don't already own an essential black turtleneck, read on for my budget-friendly picks - plus the other pieces you'll want to recreate Kourtney's entire look!