Wikiing bits and bobs about current American sitcoms, I came upon a link to Kate Micucci who plays the slightly goofy uke playing Shelley in Raising Hope. Seems there's a lot more strings to her instrument than I thought.
This made me smile a *lot*

contains a sweary word so you might not want to play it too loud at work

here's their website: http://www.garfunkelandoates.com/