I have to say that my technique and skills have improved since I last posted in this thread. I've also learned a few more songs on the piano. To challenge myself more, I learned part of Alicia Keys' 'Harlem's Nocturne', which is a classical piece somewhat, on the piano. I only learned in a few days.
Anyway, the hardest Vanessa songs to play so far is Who's To Say [the piano rhythm and riffs were so tricky that it took several months to figure the song out] and Papa. I printed out only the first page of WTS and learned the rest by ear. I only printed out the first 2 pages of Papa and learned the rest by ear. On most of V's songs I don't play the songs exactly like she plays them; I add my own flavor to them. i.e., I created a jazzy rendition of 'Red Ditty'.