It was his favorite song of 2015.

By Christian Holub
March 22, 2016 at 04:44 PM EDT
Prince Williams/WireImage

Kanye West is nothing if not unpredictable. West surprised everyone when he tweeted on March 13 that Justin Bieber’s “What Do You Mean?” was his favorite song of 2015 (it was also EW’s second-favorite song of 2015, losing out only to The Weeknd’s “Can’t Feel My Face”). On Monday, West put his money where his mouth is, dancing excitedly to the song at a Bieber concert in Los Angeles. Thanks to wife Kim Kardashian, the amazing moment was captured on video. Watch it below.

Lest you think West’s love for “What Do You Mean?” is some kind of put-on, fear not. Kardashian also caught West dancing and singing to the song in his car last week (maybe in anticipation of Monday’s concert):

Even before it was reality, West’s “What Do You Mean?” love was a meme. Bieber himself once posted a video of West dancing at the VMAs, synced to “What Do You Mean?” even though West was actually dancing to EW’s number one song of 2015, “Can’t Feel My Face”: