Ashley and Mary-Kate Olsen try everything they design for Elizabeth and James on and encourage their team to do the same, so it's no surprise they got the shape of this 'Linden' top spot on - the wide halterneck straps frame your shoulders and sit smoothly against the décolletage. Recently worn by Selena Gomez in a series of photos on Instagram, this close-fitting style is spun from a ribbed merino wool-blend with a hint of stretch.