Justin Bieber’s Trainer Opens Up: ‘He’s Well-Endowed’Justin Bieber’s Trainer Opens Up: ‘He’s Well-Endowed’Dear Beliebers, in case you were wondering about the size of Justin Bieber's nether regions, his trainer's got you covered. Let it be known, that's a sentence we never thought we'd have to write.Ali SzubiakAli Szubiak