Unfortunately, Justin Bieber's handphone number is not on public record.
Can you imagine how many people would call him if it was? The poor guy
wouldn't have time to sing!
Also, Justin, like everyone, needs to have some privacy. Pop stars give a lot to their fans, but they need some time just for them, or to be with friends and family. So even if we had his number, it really wouldn't be polite to call.
Justin has had an amazing rise to fame. Considering he was busking to earn the money to go to DisneyWorld around six years ago, it's hard to believe that just an appearance on YouTube could turn him into the household name he is today.
Justin's father left when he was three; so his mom brought him up alone and seems to have done a rather good job. Although, she has admitted that before she had him she had a problem with drink and drugs. She stopped all that when she got pregnant with Justin though, so respect to her for that.
I'm sure she is very proud of her son now!