If you think that Poison and Still of the Night are the worst covers she has come up with yet, let me disappoint you! In my humble opinion, this one is definitely the worst song of her repertoire (so far). The song was performed during the Marimekko fashion show in 2007.
Let's have a look at couple of recent but also older covers.
The Ukulele Orchestra (could be better without singing)
Jazz cover by Paul Anka
My personal favourite Herr-A-Chick