Looking for similar songs (lyric, singer, hear, guitar)

[tomektomek]

What are some songs where there's a change in the tempo, key and/or drop of the music before/at the chorus?

Like in this song at the chorus (starts from 1:15) each time she sings "Laska je laska" you can hear the guitar (?) doing what sounds like shifting down key:

https://www.youtube.com/watch?v=8BMhiU4MquI

And in this Bulgarian Chalga song, the chorus stars with a slowdown of the tempo and then it suddenly picks up. The first chorus starts @ 0:39:

https://www.youtube.com/watch?v=Bdhfb6-daHo

It's hard to explain it in English, so please hear the examples of what I mean I'm an occasional singer and lyricist but obviously not pro trained.

All styles are OK, I only know of "Congratulations" by Cliff Richard where one of the choruses starts with a slower tempo and then picks up.