Why hide, Kendall?!

We get that Kenny's a big supermodel ... but so is Hailey Baldwin and SHE doesn't hide when the paparazzi take pictures! Maybe Kendall's got a big zit on her nose? Or maybe she just doesn't feel like posing unless she's getting paid ... either way, it makes for some funny snaps for us!

Apparently Kendall was NOT in the mood and she and Hails left Pilates class Monday morning. What we could see on Kendall was her $250 Chaos iPhone case and her $720 Stella McCartney 2001 black hoodie. Less-expensive are her $24 Havaianas flip flops and her $60 Adidas Triple-Stripe leggings.

Hailey, meanwhile, wore her favorite Commes des Garcons x Nike Shox TL sneakers which retailed for $330 but are already going for as much as $400 on StockX. Her Alo leggings retail for $98 and her Alexander Wang Halo bag for a cool $1250. Her Chanel sunglasses cost $450. So add it all up and these ladies are rocking more than $3000 worth of clothing just to go to workout class!!!