The countdown is officially on.

We are 29 days away from the release of Justin Bieber's brand-new single, "What Do You Mean," and everyone is filled with anticipation -- including his new BFF, Ruby Rose.

Justin posted this pic of the "Orange Is The New Black" star, who is basically his twin, holding up a sign that counts down to Justin's big day with the hashtag #whatdoyoumean. Oh, and Ruby is doing this all during a gondola ride in Venice. So jealous of her right now, BTW.

But Ruby, who has made it no secret that she is a big Belieber, isn't the only one getting in on the excitement over Justin's new single, which is “up-tempo... fun... [and] summery," according to Bieber. Justin encouraged fans to create their own cover art for the track, and I have to say, they got pretty creative.

Some even used Justin's pics from that racy Interview magazine spread.