VIDEO : Is There Bad Blood Between Zayn Malik and Louis Tomlinson?!

Zayn Malik's exit from One Direction apparently wasn't as friendly as they wanted everyone to believe ... because Zayn and Louis Tomlinson are now publicly trash talking each other. Zayn just posted a heavily-filtered photo of himself with record producer Naughty Boy and Louis jumped on it, tweeting, "Remember when you were 12 and you used to think those Mac filters for your picture were cool haha! Some people still do HA!" Zayn was locked and loaded, firing back, "Remember when you had a life and stopped making bitchy comments about mine?" People connected with One Direction are still insisting to fans that when Zayn left everyone was cool about his departure, which seems to make no sense.??