Trust me, that song will now be stuck in your head...
Start off with a base colour I used OPI's "Fly" (Nicki Minaj Collection) I use this colour a lot, it's definitely worth purchasing if you can find it!
With a striping brush, put a yellow long streak and let dry. I used OPI's "the IT colour"
Once it dries, get another striping brush and outline the bananas with black.
Seal with a top coat and you're done!
You don't have to do different bananas all over, I just wanted to do that!
Enjoy!
kmatheson