Her BBM contacts? BBM contacts will be connected with her BBID if she ever remembers her BBID password.
The device contacts, will not be saved if they are ONLY saved on the devivce. If your friend has ever performed a backup of her BlackBerry to her PC, or has BlackBerry Protect installed and backing up, she should be able to restore those contacts from the PC or Protect.
So, more information from you (or her) is required for a specific answer.