According to TMZ.com, Big Sean reportedly thought that when Justin Bieber got handsy with Ariana on stage, she was using the Biebs to hurt him. Sources "closely connected" with the former couple told TMZ that Sean broke up with Ariana earlier this month because she was "immature" and Ari retaliated after the split by staging the sexy performance with Justin. Insiders claim Big Sean thinks Ariana made the calculated move to get back at him.
The sources also point to Ariana not supporting Big Sean's "most important appearance of his career" at the House of Blues in February because she was getting ready for the Grammys. Sean also reportedly traveled "10 times more" to see Ariana than she visited him and he thought she was immature to want him to spend thousands on taking a private jet to be with her.