Which song should i sing for SM audition?

Um i really like the song i love you from Taeyeon, i can sing it well but it's a little high for me. I don't have a very high voice but i heard that SM really like it when you sing high so what should i do? I really love all songs that taeyeon sing but don't know which song will fit my vocal range. Can you please recommend me couple of good songs that can impress the judges. I think teayeon ost songs are good but you can choose what you think is good. Also what is the best way to audition for sm? i already auditioned in LA but do they look at everysing audition more or email or online?

ps: i have a voice that is soft sweet kind of like taeyeon but my voice range is not as high, i can also sing like lee hi like her strong voice. My voice is mezzo soprano and i can sing pretty low too.

Please email me at tiger_20109888@yahoo.com if you really want to hear my voice and want to help me out. Thank you!!