歌曲：不怕不怕 - 郭美美

MAI-A-HEE MAI-A-HU
MAI-A-HO MAI-A-HA-HA
MAI-A-HEE MAI-A-HU
MAI-A-HO MAI-A-HA-HA
MAI-A-HEE MAI-A-HU
MAI-A-HO MAI-A-HA-HA
MAI-A-HEE MAI-A-HU
MAI-A-HO MAI-A-HA-HA

Hello！看我！你在害怕什么？
是我错，没能够啊把自己变得成熟
伤口那么多 没地方可以再受伤了 (已经不怕再痛)
没什么 转身以后 我会练成护体神功！

看见蟑螂 我不怕不怕啦
我神经比较大 不怕不怕不怕啦
胆怯只会让自己更憔悴
麻痹也是勇敢表现

一个人睡也不怕不怕啦
勇气当棉被 不怕不怕不怕啦
夜晚再黑我就当看不见
太阳一定就快出现

The melody is taken from a dance mix song. Spanish if I remember correctly. I also heard that Crazy Frog got a version, but I am not sure. The MTV is cartoon, and the way that 郭美美 sings, is with a bit of a childish feel to it. The trailer on TV is showing the chorus, the part about being not afraid of cockcroaches.
Update: Mich just told me it's Romanian.

All these factors combined to give the song a childish feel, a fun song not to be taken seriously.

But I thought the lyrics is quite nicely written. It's actually about a lady who was hurt, presumably in love, trying to pick herself up. All the light heartedness about the song is to mask the hurt she feels. Something that people would not know about unless they took a deeper look.

Or maybe it's me thinking too much...