Tiga means three. No, she is not singing about the topic that Britney sings in 3.
In this song, Dayang disses her greedy two timing creep of a boyfriend. Dayang refuses to be trapped in the love triangle and decides to end the drama!
You go, girl!
Tiga is written by Audi Mok/Nur Fatima. I have no idea who did the remix this and what the remix is called. I found this version from the internet. Anyway, I love this version. Bouncy, dancey and filled with kickass beats!