For Sexy Summer Staples: Beginning Boutique If you're looking for a sexy summer dress, we'd recommend Beginning Boutique. The site is filled with on-trend pieces that are easy to style, and much like Princess Polly, the brand is also based in Australia. This open-back Beginning Boutique Genovia Floral Mini Dress ($80) is a summer staple you can dress up or down. Image Source: beginningboutique.com Beginning Boutique Genovia Floral Mini Dress $80 from beginningboutique.com Buy Now