Vanessa's songs, given that she also sings, are not too hard to play at all. I'd say the easiest is Who's to Say; it's basically just the same chord progression over and over again.
^ Yeah, it's easy, but not as easy as Twilight!!
I had previously printed out the sheets but I never attempted it because I didn't really know the song too well at the time. Yesterday, I finally looked through it, and wow - that IS easy. I guess you guys are right.
And if you're looking for a Nessa song to play with limited piano training:
-Ordinary Day
-Twilight
-Who's to Say
-Pretty Baby
Just any song that doesn't rely on the piano too much and more on chords.