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With its flattering fit and stylish design, this dress is the perfect choice for any special occasion

Professors have also joined the scientific discussion on Twitter, while celebrities including US singer Taylor Swift, talk show host Ellen DeGeneres, actor Will Smith's son Jaden and reality TV star Kim Kardashian have been tweeting about the debate

You can learn more about the differences in our guide to double-breasted vs single-breasted suits

A kitten heel or higher often makes the look more formal, but its also important to be able to walk easily and with confidence so choose a heel height that you feel comfortable in

For her part, Gomez nailed the art of French-girl style in a Saint Laurent tuxedo dress that was equal parts simple and striking

Cheers to a fabulous 30th birthday!