Big Sean — Ariana Grande Used Justin Bieber as a Weapon to Hurt Me

EXCLUSIVE

Ariana Grande lashed out at Huge Sean almost immediately after their breakup by staging Justin Bieber‘s come-from-behind stage embrace … so claim sources accurate to the couple.

Sources closely connected with them tell TMZ … Sean claims it was him who broke off the relationship because she was “immature.”

Sources say the breakdown of their relationship started in February, when he made the most vital…