Hmmm. The video in the first post is Jantje Smit singing "Ein bißchen Liebe" (A Little Bit of Love). Doesn't sound like "Tulips from Amsterdam" at all to me.

Wikipedia says "Tulpen aus Amsterdam" was first written in 1953 by Klaus-Günter Neumann, but his publisher didn't like the song. So, the lyrics were rewritten by another songwriter and a new melody was composed. I wonder what was left of the original song - just the title?

So, then we have the 1957 recording of "Tulpen uit Amsterdam" by Herman Emmink here:

https://www.youtube.com/watch?v=85U-77_5lWk

...and then a version by Max Bygraves (I think from 1958) here:

https://www.youtube.com/watch?v=qPsq6flck2A

...and then a 2010 performance by Andre Rieu:

https://www.youtube.com/watch?v=XRvhNONZcfs