Bieber will bomb HARD. He will obviously go #1 on iTunes for some days (the #1 song is selling 110k now) but it will plummet and fail because everyone hates him.
I'm sure Gaga fans can live with the fact that ARTPOP is not multi-platinum anywhere. It's not like FASCISM is multi-platinum in countries where it's to hard achieve: US, UK, Japan. Please, don't bring Australia into discussion. As I said RedFoo has probably outsold The Beatles discography there so no one cares about achievements of some terrible singers in Australia