Mice actually do sing a special ballard. The males do anyway. When a male mouse has his eye on a special female, he has an extraordinary inaudible luv song he will sing to her.
It's a ballard we as humans cannot hear.
The songs vary and some mice sing better then others do. Some can sing beautiful love ballards while some sound like the try outs on the American Idol.
In a study by Kerstin Musolf, they are trying to find out what makes a love song such a welcome song for a female. What makes the girl mouse pick that mouse in particular over another one.