looking for an early 2010's (?) pop song.. Female singer with falsetto

Really catchy mid-tempo pop song that I've been hearing alot in grocery stores and stuff. It's definitely a newer song, sung by a female with a great voice. Sounds alot like Zooey Deschanel or Ingrid Michaelson, but I don't know if it's them.

Some details:
- The song is sung in falsetto the whole time.
- The opening line to the chorus is possibly "Now let's do this", and she definitely sings "Never suited me" at some point during it.

- The song fades out to a whistling solo that mimicks the chorus melody.

It's really hard to understand the lyrics because of her high-pitched voice, but it's such a great song and I'd really like to know what it is.

"The War" by Lucero or "Disco 2000" by Pulp?