There are a lot of funny songs out there, but I'll just show you the ones that I can think of (and fit into this post). Most are gonna be by Berryz Koubou.
This first one is really catchy. The song is called Suhada Pichi Pichi:
This song doesn't have a PV, sorry! ^ ^;
This next one is called Yuke Yuke Monkey Dance:
I love how their dance is JUST like a Monkey! ^ ^ Hah!
This next one is by Perfume, it's called Love the World:
I don't think it was THAT funny, but it's kinda more interesting and pretty at the same time. Their dances are funny, though! ^ ^
This is next one is Koi no Dance Site by Morning Musume:
This one's really funny especially since the "Sexy Beam!" is Mari Yaguchi's kinda thing. She was embarrassed to do it, but she had to. In order of solo appearances: Abe Natsumi, Yuko Nakazawa, Maki Goto, Mari Yaguchi, Sayaka Ichii, Kaori Iida, and Kei Yasuda. I just realized something! This is the first Morning Musume video/song I've ever seen! O.O
Alright! I gotta go!
