What was the opening song in Numb3rs Season 2 Episode 13?

Sadly, they weren't in the credits. Going through it slowly, this is what I think she's saying.

Take you picture, all up in my head
All up in my head, run a mobile through the thread
All up in my momma and I'ma wait this, 'stead of sleep
Ride da back, come on, counting sheep

Can't no Mountain keep me from climbin
Never too high, ocean never too deep, roads windin

Those last two lines are definitely right, and the rest, I can't make out

Chorus:

Somewhere down the line
I feel it, no mind
Feel like I'm losing my mind
But it's only a matter of time