Not gonna lie -- this isn't our favorite look on Selena ...

Gomez wore a navy blue Chanel nautical pantsuit for The Dead Don't Die photo call at the Cannes Film Festival, on Wednesday and it kinda looks like even she didn't like it! It's basically a glorified terrycloth track suit ...

And why did her stylist Kate Young put silver earrings with this gold-trimmed suit?! We get mixing metals, but this was not the opportunity for that ... Selena wore gold braided heeled sandals and her spiky hoops contrast a bit too much!

Now here's for more bad news ... Selena's film is a horror flick -- yes, horror. Why'd she do it, you might ask? Maybe she just needed to work again, but personally, we think it wasn't the right choice. Selena might wanna think about changing her stylist AND her manager ...

Here's the film synopsis -- and Rotten Tomatoes gave it a sorry 54%. We WON'T be seeing this one ...

"In the sleepy small town of Centerville, something is not quite right. The moon hangs large and low in the sky, the hours of daylight are becoming unpredictable, and animals are beginning to exhibit unusual behaviors. News reports are scary, and scientists are concerned. But no one foresees the strangest and most dangerous repercussion that will soon start plaguing Centerville: the dead rise from their graves and feast on the living, and the citizens must battle for their survival." Yikes!