What do you mean Justin Bieber isn't attending the 2021 Grammys this weekend?According to Page Six, the singer, who's nominated for four awards, has decided against attending the music industry's biggest night because he's still upset that his album "Changes" is nominated in the pop category instead of the R&B category.At the time of Justin's four nominations last November, he voiced his frustrations on Instagram, writing, "I am flattered to be acknowledged and appreciated for my artistry.