She has a lot of fans in Indonesia and Philippines judging from iTunes and twitter. But I don't know about the other Asian countries. But I guess they did a market research? Besides maybe it is less expensive booking a 10k arena once even if it sells 5k than booking two 2k venue dates.
Can't speak for other countries but she is not that big in China. She is only known for being JB's ex. LYLALS was a hit here but hardly anyone knows who sings it.
zzz.... i think i am going for the singapore and Shanghai one. She better not cancel this one no matter the sales else i really will unstan (Unless valid reason). No breaking my heart anymore.