The Mills Brothers sang a strong version of "Tiger Rag," in my opinion, by nailing the tune's fun, fast spirit.
Ferrante & Teicher mastered the tune's frenetic precision, as well, but instrumentally. I can't hear their rendition without wondering how many hours it took to master such brisk passages on two pianos. I can just imagine starting to learn the song at about half-speed and then upping the tempo incrementally with a metronome. For all the hours of practice that must have required, I'm glad the audience appreciated the duo's concert rendition.