Hailey Bieber Fans Flip Out on Selena Gomez Over 'Copycat' Girls Lineup

Selena Gomez and Hailey Bieber's non-feud is once again being resurrected via their overeager fans -- this time ... it's Hailey's supporters on the attack, calling Selena a copycat. As you might notice ... Hailey is trending right now, and it all…