I always sing to my kids.
In the morning I sing to Ruby whatever song comes on on the clock radio when the alarm goes off. The funniest was one morning the song that came on was Kanye West's song Stronger. I started singing/rapping (not well) and Ruby stretched out her leg and put her paw up and covered my mouth. Completely cracked me up and was the only time she ever has done that. Evidently she wasn't a fan.
Aaliyah's theme song is the Black Eyed Peas song Boom Boom Pow - she is too funny.
Ozzy's is Crazy Train - Ozzy quite likes my singing and is quite intrigued by that song as he will stop whatever he is doing and get up close to my face when I sing it to him, lol. Once in a while he throws in a kiss when I'm singing it.
Lately I've been singing Earth Wind & Fire songs to Brando, but he seems to ignore it.