Infinitely feminine, flattering and elegant, a sweetheart neckline gives a pretty yet sultry appeal to any dress. Ultimately versatile, the simple cut can transform any piece. On a maxi dress, it speaks of classic elegance and sophistication, while it takes on a much more playful and flirtatious vibe when found on a floaty strapless skater dress. Donna Morgan does the latter perfectly, while Stella McCartney brings a more androgynous appeal with her jersey shift dress with sweetheart neckline detailing. Alternatively, Alexander McQueen's bodycon dresses exude instant glamour. Whatever you're looking for, this selection offers every style.