Justin Bieber's mother is proud of the ''amazing man'' her son has become.

Pattie Mallette has posted a gushing Instagram post about the 23-year-old pop star just days after the mother of Selena Gomez, his girlfriend, admitted she did not approve of her daughter's relationship with Justin.

Pattie, 42, shared a photograph of herself and Justin embracing on board a yacht, and she captioned it: ''I'm so proud of the amazing young man you are, and the young man you are becoming.

''None of us are perfect and never will be, (so we will always need patience and grace for each other), but your genuine growing relationship with Jesus is evident in the choices you are making daily and the good ''fruit'' you bear. I admire your character and integrity. You are maturing beautifully and wise beyond your years. You are so funny that I find myself laughing out loud when I'm alone, remembering of something you said or did. And your heart is gold. I love you to the moon and back. #lovemom

''Ps. Did I mention I was proud of you? (sic).''

Justin rose to fame as a child after his mother began posting videos of him performing on YouTube, and she managed his career in its early stages.

The 'Baby' star has been dating actress-and-singer Selena, 25, on-and-off since 2009.

But the brunette beauty's mother, Mandy Teefey, recently admitted she is ''not happy'' about them rekindling their relationship late last year.

Mandy said: ''Selena can live her life however she wants as long as she is happy, safe and healthy...

''She is 25 years old and knows what is at stake with her health. I do not control her the way it has been portrayed. Selena is an adult and can make her own choices.''