Justin Timberlake

J-Timbo seems to spend more time in the actor's studio than the music studio these days, but it's clear he still has the vocal chops when push comes to shove. Here's two obscure pop references: Justin's look is from the Gnarls Barkley video for "Run," and Michael's sporting this ensemble for a hot second in his Pepsi commercial. But the glasses and hair are a clear shout-out from a modern pop icon to a timeless star.