Kourtney Kardashian, Brooklyn Beckham, Cody Simpson, Shia LaBeouf (who took his mom as his date!), and many more celebs like Chrissy Teigen, John Legend and Meghan Trainor pulled on their best gear to hit up Kanye West's third Los Angeles concert during his Saint Pablo tour on Thursday night. Clearly, the show was the hottest ticket in town!

Of course -- all eyes were on Kourtney who opted for a pair of thigh-high blue velvet boots which she paired with a Metallica T-shirt -- and basically that's all! We wonder if Kourt's ever even heard a Metallica song?! Either way, that mom is keeping it sexxxy!

Kris Jenner, Corey Gamble, Karrueche Tran, Christina Milian, Jimmy Iovine and Liberty Ross were some of the other famous names who hit up the concert at the The Forum in Inglewood, Calif.

Even Kim Kardashian, who is keeping a super low profile after being held at gunpoint earlier this month, managed to slip into the concert for the third night in a row. She's a true Yeezy fan!

Earlier in the day, our photogs caught the rapper handling some business before his concert. In keeping with the new sportswear-as-daywear trend, the "Famous" performer was outfitted in a long-sleeved black shirt from the Saint Pablo tour -- like he'd wear something that didn't promote himself in some way?! -- sweat pants, and a pair of Adidas trainers. Athleisure or athLAZY?