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Justin Bieber was almost as excited to have Kanye West in the audience as the rapper was to see the 22-year-old pop star perform.
Kanye, 38, and his wife, Kim Kardashian, attended Bieber's concert at the Staples Center in Los Angeles, California on Monday night, and it was clear from Kim's Snapchats that they are diehard Beliebers.
After revealing earlier this month that his favorite song of 2015 was Bieber's "What Do You Mean," Kanye was seen happily dancing and singing upon hearing the hit performed live.
WATCH: Kanye West Ditches His Uber for a Ride From the Paparazzi
Kim also serenaded her husband as Bieber performed "As Long As You Love Me."
"Shout out to one of my inspirations @kanyewest for coming to the show tonight," the Purpose singer tweeted after the concert. "Had to go big. #PurposeTourLosAngeles night 2."
WATCH: Kim Kardashian Snapchats Kanye West Jamming Out to Justin Bieber in the Car
Bieber also appeared a little burned out after the show. He Instagrammed: "L.A. is so fake. They drain me until I'm dry."
Prior to Bieber's shows at the Staples Center, ET exclusively obtained footage of him giving an impromptu performance and speech at the 1OAK nightclub in West Hollywood, California, on Saturday night. Coincidentally, he called out West during his rant. "Yo, you guys havin' a good night tonight?" Bieber asked the crowd, announcing he was "not going to give like a 30-minute speech" because he's "not Kanye West."
WATCH: Justin Bieber's Mom Pattie Mallette Supports Him at Los Angeles Show Following Estrangement
He did, however, have some things he wanted to get off his chest. "I think people hate on people who are themselves, you know?" he said, slightly slurring his words. "Maybe I'm drunk or maybe I'm just speaking real s**t, but I feel like a lot of the reason why there's so many people that hate on me is 'cause I'm just myself."
Check out more of Bieber's candid speech and performance: