Christine Harmonizing with Herself

[Betsy]

Can someone recommend a Christine song, where she sings all the parts and harmonizes with herself? (By that I mean no Lindsey or Stevie or anyone else singing along, but there are 2-3 voices and they are all Christine.) I hope that this makes sense.

I was listening to the I Can't Help Falling in Love (Elvis cover) and wondered if she is harmonizing with herself. I love her voice.

Thanks for humoring me...