Just Say No? 80s makeup is back for Fall. Photo: Courtesy of Nars.

The Fall 2009 runways announced the return of - gasp - the 80s. And we're not just talking shoulder pads.

At the Marc Jacobs show, makeup artist Francois Nars reintroduced the decade's most colorful trends: yellow shadow, frosted lips and hard core liner, to name a few. Also back? Colored mascara a la the Wham! album cover, below.

But don't gag yourself with a spoon just yet. We asked the pros for tips on how to modernize these looks. In other words: how to take them from totally tubular to cutting edge.

Click through the gallery below for the full 411.