The Ultra Linx [This cute graphic also combines two images using negative space to depict a rabbit holding a carrot. the shapes are obvious and appealing, and the logo would work on varying scales. The use of an achromatic colour scheme is effective in creating an immediately recognisable image.]
Shapes of instruments are commonly used in logos representing music related businesses but his one is quite clever. I believe '11' is the name of this music playing/ selling establishment and it's elegantly incorporated into the black keys of the piano. The visual is sophisticated and gives a classy, high end feel.