The lines "You never know how great a kiss can feel / Until you stop at the top of a Ferris wheel" contain the highest pitches in the lead vocal (Es), giving a sense of the height of "at the top."
Cannon's version is a half step higher (Ab major), so the pitches there are Fs, but the feeling is the same. Unless I'm mistaken, the lyric is a bit different, though: "You'll never know how great a kiss can feel / When you stop at the top of a Ferris wheel."
In the line "And around like a merry-go-round," "around" is sung with a melisma (D E D), giving a slight sense of this movement. This articulation isn't in Cannon's version.