My sister's involved with Hillsong. A scam if ever I saw one. I no longer have anything to do with her.
In the case of IHOP they have sexualized lyrics which they front as worship music by over emphasizing being the Bride of Christ. This leads sexually frustrated / confused (in a Christian viewpoint / sense) youths even more confused about Jesus and their relationship with Him. Its a lot to take all at once so research it and pray about it and take your time. I just personally avoid IHOP / Hillsong for multiple reasons. The other thing to remember is they are not all at fault some are just there genuinely or misled into being there.