It's a female versus male battle for the best-looking wearer of overalls! With their baggy design and covered-up front, overalls were a unisex staple back in the '90s, and they're making a big comeback lately.

Rihanna, Jesy Nelson of Little Mix, Justin Bieber and Niall Horan of One Direction have all been seen rocking overalls over the past year. Now the question is, which star looks best in their denim suspender jumpsuits?

Rihanna has actually been rocking overalls for a while now, but this particular pair of washed-out denim overalls has to be our favorite. RiRi wore them while out and about in London on June 17, 2013, sporting a beanie, colorful high heels and a teeny-tiny black top underneath. Jesy Nelson of Little Mix wore a similar pair of overalls the next day, also in London, but the 'How Ya Doin'' songstress paired hers with white sneakers and a white tank.

Meanwhile, Justin Bieber infamously wore a pair of half opened pair of overalls while meeting the Prime Minister of Canada. Not the best attire for such a formal event, but Bieber still looked cool in his bright yellow sneakers, fitted hat, chain, white tee and low-slung denim overalls.

Finally, Niall Horan rocked a pair of overalls while doing some press stops with One Direction. The Irishman is doing it right with his dark denim overalls, channeling the '90s with his T-shirt and slip-on sneaker combo.

Who do you think wore overalls best? Vote for RiRi, Jesy, Justin or Niall below!