When dd was younger (between 21 months and 3 years) She used to memorize entire books after just a couple of readings and would recite them without looking at the books. She had also memorized all the lines from the jungle book movie and could enact any scene verbatim with proper intonation and expression. Now at 4.5 yo, she seems to have lost that talent, though not completely. She did recently learn the let it go song in both English and the 25 languages one after listening to both songs maybe 5 times each. So it is there but it is no longer jaw dropping.