Chanel West Coast, Lexy Panterra Urge People to Stop Peeing in Coachella Crowd

Justin Bieber‘s a main draw for fans at Coachella this year … and Chanel West Coast and Lexy Panterra really want people to go to the bathroom at a port-a-potty before the show — not on the ground during it!

We caught up with the stars at the Grow & Glow festival by Victoria Jancke near the main festival grounds Friday … and we had to know what they were most excited to see at this year’s event.

Chanel immediately says the Biebs … remembering him from when he showed up at Rob Dyrdek‘s Fantasy Factory more than a decade ago — and complimenting him on the direction his career’s gone.

Lexy says she and Justin almost got into a fight once — unclear what exactly she’s referring to here — but, they’re cool now … and, she thinks a headlining Coachella spot is exactly what he deserves.

However, Lexy admits she has a concern for Bieber’s show … fans will be waiting around all day for it — and, she’s already seen some on Coachella weekend popping a squat and relieving themselves.

This is especially problematic for Lexy, she explains … because she often sits before shows — and, she’d prefer to avoid a literal interpretation of “On Golden Pond.”

Chanel smiles and politely just nods along … but, it seems clear from her expression she knows exactly what Lexy’s talking about.

We also got the pair’s makeup and energy tips for the long weekend … watch the clip all the way through for all their advice.