Oliver has been pretty entertaining lately. For the past few weeks, he's been a self-proclaimed rock star, playing a mean fake guitar (and making a grimace that is unforgettable) and also singing into a microphone. He usually makes up words to his songs, which is pretty creative. However, they're not great lyrics by any means! But he's sure funny to watch.

Here's what we get to enjoy every day (warning: the video is a little long):