Khloe Kardashian and Lamar Odom were amicably reunited at Staples Center in Los Angeles Monday night, as they watched their future brother-in-law Kanye West take the stage.

A source told People that Odom "came in with Khloé, Kris, and the whole crew, Kim included" and "walked into the arena to huge cheers."

"Lamar set next to Khloé in the VIP section. He was smiling and talking to her. They seemed so happy to be out together and both said 'Hi' to friends around them."