Evan Agostini/WireImage; Brian Ach/WireImage
Justin Guarini
To many, he was the guy with the big hair during the first season of Idol. But as the season progressed, he became known as equally for his vocal talent, ending as runner-up to none other than Kelly Clarkson. Since then, Guarini's started his own production company, Justice Entertainment, Ltd., made his Broadway debut, and toned down his look by sticking to buttoned-up ensembles and closely-cropped locks.