So the song is terrible because she has an "annoying" laugh?
Ok, first off, she laughs once in the song, and it's at the very end and it's not annoying at all.
Second, the song is produced by Dr.Luke. He has produced I Kissed A Girl, Hot n Cold and About You Now, which were all huge hits and all very catchy.
Just because you don't like the girl, for whatever reason, you don't even know her, doesn't mean the song is bad.
The song is very good.
Bottom line.