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！
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...