A bright pink clutch and plentiful polka dots put a playful twist on Emmy Rossum's Oscar de la Renta gown at the L.A. Opera's 2014 opening night.

But it now: Oscar de la Renta Tiered Tulle Gown

Helen Mirren turned heads at "The Hundred Foot Journey" London premiere in a crisp tea-length dress by Suzannah covered in inky flowers and cinched with a black belt.

Buy it now: Suzannah Dancehall Dress

Cameron Diaz dressed up a plain white top and black skinnies with a bold, zebra print jacket by Balmain for a photocall for "Sex Tape" in Paris.

Buy it now: Balmain Animal Print Knit Jacket

Alexa Chung showed off a pair of lace-up with a strapless, tea-length dress by Osman covered in spirals for Harper's Bazaar Celebrates ICONS by Carine Roitfeld party in New York.

Try this beaded ball gown by Alice & Olivia for your next formal invite.

Taylor Swift paired a cage strapless bustier and a cage peplum skirt by Sass & Bide to create a flirty dress at Deutscher Radiopreis 2014 in Hamburg, Germany.

Create an equally fun party look with this chevron peplum dress by Alice & Olivia.