Heidi Klum aced the bejewelled strapless gown look with a pair of crimson heels Heidi Klum proved that ... was a vision to behold in a strapless purple gown with a plunging sweetheart neckline ...

The four categories are color-coded in yellow, green, blue, and purple, where yellow is traditionally the most straightforward and purple is the trickiest. Keep reading to find a few hints ...