Where ever you go, go
Cry me a river
That leads to your ocean

from Destiny's Child – Emotion Lyrics on Rap Genius

Meaning

She has cried over him, heartbroken that he left her. She hopes he too is crying over no longer being with her, hoping that they will reunite one day.

She figuratively wants him to cry her a river (a famous symbolic lyric used famously by Julie London and Justin Timberlake in their records — both called ‘Cry Me A River’)
If he cries a river she wants it to symbolically lead her to his ocean — for him to long to have her back so badly that she is able to reunite with him.
http://www.youtube.com/watch?v=DXg6UB9Qk0o http://www.youtube.com/watch?v=DksSPZTZES0

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