This song is driving me insane!

Hello! I'm desperately hoping someone knows this song!

Could some music guru help me?
What I know:

1) I heard it in the store May 3rd. I've heard it before so it's relatively recent and popular!
2) It's definitely not R&B or hip hop, but perhaps either borderline pop-y or alternative rock, a little folksy - something similar to Natasha Bedingfield
3) It's a female singer with a pretty rich voice, who sings and the ONLY word I could catch (it's really loud in the store!) was TRIBUTARY (or tributaries) as in the river.
4) It's starts out with full gusto, very epic sounding, and guitar
5) It's rhythm in the beginning is sort of like this (I'm just filling in random words so you can kind of get the rhythm down)

"white mountains and tributaries
white clouds and sandy beaches"

I'm so sorry for the vagueness! It'll probably take a genius and a mind-reader to know what song it is, but please help if you can"

Maybe a cover by Twinemen of "Down Love's Tributaries" (originally by Morphine)?

Meanwhile
Down love's tributaries
In a canoe on my knees

Overcome- Juliette Commagere

THANK YOU cubester710!!! I can't believe you actually got it!