Harry Styles's #iHeartFestival outfit is a definite stand out...

Welp, his last name isn't Styles for nothing....

Harry Styles showed up the iHeartRadio Music Festival in what is quite possibly the PERFECT outfit to wear in Las Vegas for such an occasion ... and the only way we can describe it is, it's just so Harry. And it's magnificent.

Photo: Getty Images

Harry rocked a beautiful red and blue patterned Gucci suit, flared pants, with a white ascot. In fact, you might say it's a little reminiscent of someone you may be familiar with...

Either way, Harry's fans were LOVING this look.