Oh, look! Katy Perry is a hard-core Belieber.

It's not like we thought Katy Perry DIDN'T love her some Justin Bieber (remember when this happened?), we just didn't think she loved him SO MUCH that she and her friends would all sport JB's signature purple hoodie at his concert last night. Yep, Katy Perry dressed up like Justin Bieber and it's not even Halloween.

Katy and her pals attended the four-time 2012 MTV EMA nominee's "Believe" tour stop in L.A. last night (sadly, they were not in attendance for puke-gate 2012), and as you can see by the purple explosion above, they were preeeeeetty excited to be at a Justin Bieber show. In fact, Katy was so proud of her color coordination that she proudly tweeted the photo out to all her Katycats along with the caption "WE ARE BELIEBERS!" Are you? We couldn't tell. But srsly, if Katy and The Biebs are so into each other, then you know what we're gonna say next: COLLABORATION TIME bb's!

Photo credit: @KatyPerry